Sign or not this is pretty much how cyclists are supposed to cross most big intersections and the inconvenience of it is the reason so many of them break the rules. If you make rules that are too complicated, counterintuitive or inconvenient people will break them.
Privacy Enhancing Technologies. A blanket term for anything protecting your identity (Onion, VPN, etc.) I feel like the people asking for this either have a very limited technical understanding of it or completely different motives. You can’t ban encryption. What they could do is ban VPN services from officially operating or certain protocols but that would mostly hit your regular user.