The term "mingebag" is used to denote newbies in Garry's Mod, as it is your default name when you start the mod. So, anyone on a Gmod server named "mingebag" is pretty likely to be playing for the first time and doesn't know how to change their name.

In other news, I played the F.E.A.R. demo this weekend and put a little write-up in the News/Extras section.