For example:

Lowbie squatters: If I see one, role permitting I rank just up to the upper limits of their pk range, kill them and full loot them. Sometimes you see these guys sitting and griefing newbies so long they distend. Makes it even easier for me, and I can usually do it pretty easily since I like playing warrior/hybrid types. It's especially satisfying if they whine after you do full loot them. These are guys that spend every second they have trying to kill everything that moves at lvl 20 and make no effort to rank, I have zero pity for them. They're fucking with everyone else's fun stick, I have no qualms about fucking with theirs.

Hopefully they'll rank up to try and get revenge, at which point they won't be in the range of all those lvl 15~20 newbies/semi-newbies trying to learn the game. If I see that I'm happy I did my part to make CF a better place.