I was there too.
FrozenCitrus's. Frozen and other admins were pissed that people were killing them...within their fort's walls...not inside their spawn room - a.k.a. a legitimate kill. Frozen and his admin lackey were being killed fairly by their own rules but instead chose to wand the builds of those attacking them raising the accusation that the builds were spammy. Then they claimed that their attackers were spawn killing them using the MAS, resulting in a ban.
Moral of the story: Anticipate that players are going to use the MAS in your server if you are lazy enough not to disable it. You're not going to prevent them from using it by complaining about it on the forums.
Also: Hosts should be expected to play by their own rules. Hosting is not an opportunity to go on a wild ego-trip just because you lack DMing skills.