It'd be tough to phrase it right. Imagine that The Ones Who Ban Things decide to write something interpretable as essentially "nobody is allowed to inform others about things". The process of distilling any ad banning law into applicable testing of that law would be pretty scary to me
Other legistlation plays a similar game:
- Slandering laws set a limit for what you can say about others
- Copyright laws set a limit on what you can share with others under which circumstances
Both those things seem similarly complicated to implement and yet we have them.