Ajain, technically, they can't 'remove the command' mainly due to the fact that it's in-built into the Bukkit source code. However, you can block it with simple plugins and code. I could probably make one in about three or so minutes. Or Surge could be smart and switch to Spigot which would help.. But, that's not happening. Anyways, it should be blocked due to spam reasons.
Maybe he shouldn't of advertised. I have warned him before for evading. I will jail him when I get on.
I think he was saying defrag should just deal with it. Correct me if I'm wrong. Don't actually correct me, I hate being proven wrong :3