@Miaumon, with regard to the PH server, you have 2 mods who are good but only one of them plays the server often, but still, not all the time,
I support the idea of mods, but those who can be trusted - plus if you have reasonably frequent admins on servers they can check up on the mods anyway while they play. Personally I don't see mods 'exploiting' to the detriment of others, all I see are punishments given out too quickly without justification i.e. no warnings given before muting etc.
It's up to the admins, but I think it would help the servers especially in providing contact links with admins in case something does go wrong.