On balance I'd rather things like "workshy scum" were left in, obnoxious as they are, provided, as the Ed says, they are not directed at individuals. Then people can be taken to task as necessary.
Arguably if a post contains nothing but something offensive or abusive then it should go as removing it will not detract from the discussion.
But discussions can be spoiled by the removing of a post which might contain other stuff besides.
I'd repeat what I said earlier that anything else that adds to obscurity, like unfamiliar acronyms, should be discouraged.