The problem of the maniacal ganker camping one low level for 5 hours can be resolved in an easy way by Blizzard.
Remember the "Disonorable Kills" in the old Vanilla WOW ?
Put them back in . First 3 kills/hour of a guy with more then 10 levels under you - are free.
Then if he don't atacked you first:
The 4th one give you -100 honour points .
The 5th kill -200.
The 6th -400.
Then -800. Then -1600. Untill you finished your gathered honour points.
Then you continue losing the conquest points.
After finishing the gathered conquest points , start going in negative value .
I bet will be fun ganking a lvl 20 for 3 hours and ending with minus 15k conquest points and minus 20k honour points.