Then your country will look like Germany did until a few years ago, with no WiFi hotspots anywhere, not even in Starbucks, and people being careful not to open their WiFi to guests at a party even.

That's what has happened before, that's what's just going to happen again. In Germany, the owner of a WiFi hotspot was liable for anything users on the WiFi did, unless the owner could prove that every user had signed an agreement that they would not do illegal stuff