As far as the whole web, you can’t, and if you care about free speech you shouldn’t try to. Everybody talks about getting rid of these people, but the unspoken assumption is that the person making the statement or people in their in-group will be deciding who gets a voice. A rule of thumb I use when thinking about laws or administrative controls is to consider whether they could be used against me should someone who doesn’t like me gain power.
As far as individual sites, have clear guidelines and enforce them. Be open with people why they’re being banned (looking at you, YouTube). On the Fediverse, block and defederate.
As far as the whole web, you can’t, and if you care about free speech you shouldn’t try to. Everybody talks about getting rid of these people, but the unspoken assumption is that the person making the statement or people in their in-group will be deciding who gets a voice. A rule of thumb I use when thinking about laws or administrative controls is to consider whether they could be used against me should someone who doesn’t like me gain power.
As far as individual sites, have clear guidelines and enforce them. Be open with people why they’re being banned (looking at you, YouTube). On the Fediverse, block and defederate.