Nobody needs the people who harass others and attempt to ridicule them into silence.
Incorrect without further qualification.
There are people in the set of "others" who very much deserve harassment and ridicule--consider people actively working against the common good, like Scientologists or other online trolls or robber barons or city bosses.
Internet trolls are the people who dox others and drive them to suicide.
We can achieve more without them than with them.
You need us. :)