"We omit names and faces of the authors because we have no intention of exposing anyone. We just want to educate people so that in future they think about the consequences before posting racist comments,"

This is always the same thing, educating people, make them realize that comments have consequences, etc. But, at the end of the day, does it ever work? I mean if someone makes racist comments that's because they're racist, they're racist in a world where racism is daily condemned, how can a billboard change that?

All these campaigns against racism, domestic violence, etc. Do they ever yield any result?