They should've but the tech part is relevant. Obvious bad actors that are snooping around in open houses are certainly an issue but can be remediated a lot easier - you can kick those visitors out and bar folks with a history of snooping from entry - both of which work relatively well on the local level.

I think tech is specifically relevant here since this is another clear example of scaling up beyond cultural norms using technology causing emergent security issues - the issues were present all along but there were some systems in place to limit how harmful they could be and technology has released us from those limits.