> if the government knows about someone selling drugs and does nothing about it, you can sue the government.
at least in the US, there are only a few limited times the government is open to civil litigation - and nonenforcement of the law is not usually one of them
1. If drug dealers used my backyard. 2. If I knew about it and did absolutely nothing about it.
And yes, if the government knows about someone selling drugs and does nothing about it, you can sue the government.
At least in theory, in countries not ridden with corruption (which probably aren't that many).