How will we stop the bullshit?

So A lot of dumb shit happens each day such as protesters posters and vandalism just to save some chickens from being eating.This thread is to suggest good ways to stop it.

If some one puts up posters saying MEAT IS MURDER get some friends and sharpies.Scratch some good old sharpie ink all over them.

Suggest some ways to fight the bullshit.

Remember, we are not just against PETA.
Anyway, we must NOT drop down to organisations like PETAs level, where they go around teaching high schoolers how to make firebombs so they can set fire to animal research centers.

Yes, drawing on their posters is a good idea.
Also, another way to defeat PETA, many of their adverts involve nudity, so if you see one of their posters, write on it something like 'just because I masturbate to your slutty ads does not mean I will stop eating meat'
That completely humiliates PETA, and is likely to make people hate them for the kind of adverts they have.

Similer stuff can be done to other organisations that use adverts like that.