TKing is against the public sensibilities. Get proof and his IP and post it in the blacklist thread. If, as your peeps have reported to you, he's already been reported, contacting actual, individual server owners to complain will do a lot both to prompt them to action and/or (in the case of a reticent server owner) show you which servers you don't really like after all.
As for proxies, I don't know of any servers that accept proxy connections (as such).
As for proxies, I don't know of any servers that accept proxy connections (as such).