I agree in part. Rather than a full ban, it makes more sense to require manufacturers to implement obnoxiously obvious “tells” (blinding LED plus sound perhaps), and to ban commercial businesses that remove these features. No need to ban possession. For DIY creepers a ban on the behavior is enough, they will get caught eventually.

The point is to ban widespread normalization of tools that make invasion of privacy easy. You can go find a shirt button spy cam on Aliexpress, but if you get caught wearing it then everyone knows what you’re up to. Wearing one in certain places could be taken as criminal intent.

(I don’t think restrictions like this would work in the US without an amendment, but I think we’re long overdue for a privacy amendment to clarify some things.)