Mingebags can usually be grouped into a few catagories:

Noob Mingebag, will either ask how to do stuff or run around killing people with RPGs. If the latter is the case, they are:

Evil Mingebags.(A.K.A Troll Mingebags,Trolls, Clubbed Douches) Will do everything in their power to wreck the server. Agressive ones will probably deathmatch with guns, and sneaky ones will spawn huge chimneys and create spawn-traps. However, not all mingebags are like this (though many are). Some may be:

Good Mingebags. They really want to contribute something. This is the worst kind of Mingebag, and they shouldn't be allowed to have that rank but should be allowed to stay, as there is no use turning people off GMod because of their name.

satan Mingebags. These guys are the best of the best, they use exploits and server crashers. Usually they spawn minge devices such as wired autoturrets, missiles, and even blinding and prop-killing using E2 scripts. Be sure to have a good admin addon or server management system ready, and NEVER jail or kick when you know one is on the server, This will cause him to release their full potential (Watch out, they may summon his dedicated minions). Be discreet when banning or subduing a Satan mingebag or the above could easily happen.