A commuter walking past the Tesco Metro on Regent Street in London noticed something new bolted to the ledge outside the shop window: a row of small metal studs. Tesco said they were there to deter people drinking and smoking near the entrance. The photograph that went up online a few hours later told a different story, and it spread fast enough that, within a day, activists had poured concrete over the studs and Tesco had pulled them out, promising to “find a different solution.”
Whatever it cost Tesco to specify, buy and bolt those studs to a shopfront, the return on that spend was a national news story and a same-day removal job. Hostile architecture is, on the numbers, a genuinely bad investment, and Tesco was far from the only business to learn that the hard way that week. A few streets over, spikes outside a block of flats prompted London’s mayor to call them “ugly, self defeating and stupid”, more than a hundred thousand people signed a petition, and the building’s owners tore the metal out too, all while City Hall was already spending £34 million a year on outreach that reached three quarters of the capital’s rough sleepers. The studs were meant to save money. Between the two of them, they cost more of it than anyone involved had budgeted for.
The Cost of Looking Like You’ve Solved Something
Factory Furniture, the British studio commissioned by Camden Council in 2011 to design the now-notorious Camden Bench, sells the product on cost grounds as much as ideology. The two tonne concrete block is heavy enough that councils don’t need to bolt it to the ground, and its coating means almost no upkeep. On paper it looks like a rational purchase: cheap to install, cheap to run, no flat stretch long enough to lie across, so it does its job as anti-homeless furniture without a single line item for enforcement.
What doesn’t show up on that invoice is the bill that arrives the first time somebody photographs the bench and calls it what it is. Factory Furniture co-founder Dean Harvey has defended the design bluntly: accommodating rough sleepers in public furniture, he argues, would mean society had already given up on solving homelessness. It’s a coherent argument, and not one most buyers say out loud. London boroughs bought it anyway. The bench now sits in Euston, Covent Garden and High Holborn, and every one of those councils inherited the same risk Camden took on first.
A Purchase With an Expiry Date
Howard Stapleton, a security consultant from Merthyr Tydfil, built an entire company on a narrower version of the same wager. In 2005 he patented the Mosquito, a small speaker exploiting the fact that hearing above roughly 17 kilohertz fades with age. Tested first outside a grocery shop in Barry, Wales, it worked immediately, sending loitering teenagers elsewhere within minutes.
His company, Compound Security Systems, priced the unit at £495 and had sold around 500 within its first months, mostly to small retailers who got exactly what they paid for: quiet doorways, no installation crew, no ongoing cost. By 2008 thousands were in use across Europe and North America, and Stapleton was telling reporters he was in talks with a multibillion-pound manufacturer about taking the device worldwide.
Then the bill came due in a different currency. England’s Children’s Commissioner, Sir Albert Aynsley-Green, fronted a campaign called Buzz Off to get the Mosquito banned outright, arguing it punished every young person in range, including toddlers and disabled children, regardless of behaviour. The human rights group Liberty made the same point in sharper terms. Individual councils, including Stirling in Scotland, have since barred the device from public property altogether. Any retailer who bought a unit for £495 and installed it somewhere that later banned it is left with a piece of hardware it is no longer legal to switch on: money spent, asset now worthless, on a timeline nobody priced in at the point of sale.
The Same Failure, Repeated on Schedule
The Regent Street and Southwark scandals were not one-offs. The exact same choreography played out again in Manchester in 2017, spikes outside Pall Mall Court this time. A local mother and her two sons, George, eleven, and Sam, ten, covered them with cushions and left a sign reading “take a seat and a bite to eat.” The spikes came out within days.
By then the pattern was so consistent it barely qualified as news outside the local paper: install, get photographed, go viral, remove within a week. That predictability is the actual indictment. A risk you can set your watch by is not bad luck. It’s a cost any competent buyer should have modelled in advance, the same one Tesco and the Southwark landlord had already demonstrated three years earlier, in public, for free.
The Window Is Closing
For a decade, that was the entire downside: a bad news cycle and the price of a replacement bench. That is starting to change in a way that turns a soft cost into a hard one.
A Connecticut bill introduced in 2023, House Bill 6400, would have banned hostile architecture in public spaces across the state. It did not pass. Massachusetts state representative Mike Connolly has filed a near-identical bill three times, in 2021, 2023 and 2025. The current version, H.3307, defines the practice in law for the first time, as any structure “designed or intended to prevent unhoused individuals from sitting or lying on the building or structure at street level.” An earlier version of the bill set a fine of up to five hundred dollars a day for every instance built on public land.
In December 2025, H.3307 cleared its first vote in the Massachusetts House, further than either of its two predecessors got. It isn’t law yet, and the two bills before it both stalled. But for the first time, the design decision itself, not just the housing policy behind it, is what’s being written into a statute book with a daily dollar figure attached.
Harvey has never claimed the Camden Bench solves anything. His argument was always narrower than that: proximity to homelessness makes people uncomfortable, and the bench simply moves that discomfort out of view. That was the entire return on investment, not a fix, just a version of the problem the buyer doesn’t have to look at. It was already a bad trade when the only cost was a news cycle. Once regulators start attaching a daily fine to it, it stops being a trade worth making at all.
