I said it in another thread, I visit a subreddit with very strict moderation. Very strict. The place is wonderful for regulars and newcomers. It is healty and strong. One of the rules is:

>If we find that you are active in any subreddits that promote hatred toward any particular group of individuals, your participation rights in this sub will be revoked.

And another:

"Mod abuse will not be tolerated"

Those rules have worked for years.