... comes into play when the reason your pest is being disruptive is because they have a vendetta against you. This happens, often because you have had to make a ruling against them in the past or because there may have been some disagreement between you on the group, on another group or even elsewhere (eg at AS).

Okay, once again you can get a third party to oversee things and make a ruling, but it's still going to be you that's kicking them off and they are still likely to be saying it's you abusing your powers by acting on a grudge.

Tricky, no?

PS Your point about the group rules is a good one. Problem is, I can't for the life of me find where one sets rules for a group. Anyone?
Cheers,
The Verminous Thiu