...can we get the ability to block certain members from leaving profile comments? I don't mean like hobbling does, I mean an individual blacklist, so each of us could block specific people from sending PMs.

It seems like there's always some dick here who lacks the maturity to handle a downvote. It's really not worth it to suspend or ban these spoiled little children; after all, they've got to learn to handle criticism eventually; but I'd prefer to avoid the harassment, no matter how insignificant it is.