You can have a policy of "we are not allowed to publish personally identifying info of anyone."
You can have a policy of "we are allowed to publish personally identifying info of anyone at will," but you need to realize that it will also affect people you like as well as people you don't like.
What doesn't work is "we are allowed to publish personally identifying info of people that a sizable minority of the community thinks sucks."
Sure, but not by posting that info on Reddit with a link to the shamee's Reddit username. This is one of the only rules of Reddit, and it is for your protection, so people don't say "girlvinyl is KKK member and here is her legal name and address".
