It's pretty simple Mikey. They are exploiting their way through psycostats at the expense of other players, as well as being a PITA. There are even those that come into the server to simply be a bunch of defiant assholes and that's just not gonna cut it. I have gotten tons of requests over time to ban, slay, etc for people that camp all which have there own reasons behind it.
I respect most peoples opinion regarding this and other issues but the fact still remains that every admin will deal with this on different levels. I won't try to tell you, or any other admin, how to make your decisions, and visa versa.
It's all about the FUN and keeping it that way on all the servers. We do what we have to to meet that medium keeping it within reason.
Cheers
DED