[mabynogy]

I always reply to offensive people. Someone who is offensive has no arguments. Saying him he is offensive is often enough. If there is a public (like here) people will understand who is insulting who.

You're looking for a way to be less implicated. It's because you're accustomed to live in systems based on laws and rules.

People aren't bad. Most are kind and they don't want to harm anonybody. The bad guys are very few (like 1% or 0.1%) and as they are few they should be handled case by case. Building a complicated system of rules for them will just bother the "not-bad" majority.