Not WiFi, they use a proprietary radio protocol that uses the wifi frequencies as they are freeuse. They also make your 2.4G wifi worse due to that fact.

*some parts of europe

The main countries that do this, that I’ve interacted with, are Bavaria in Germany and Austria. They claim to do so to prevent people from vandalizing the toilets. People still vandalize the toilets (why?).

Just enough to buy a single gigabyte of RAM.