Could we have the stats plugin disable itself during humiliation? Not only are people being able to boost their stats with free kills after rounds, but there is a specific issue with engineers.
If I am an engineer, and I have a sentry gun built when the round ends, I lose 3 points from the stats plugin when the round changes (new stage) because of sentry disassembled, which doesn't make any sense that the plugin would count that in the first place, but the solution would probably be to disable stats collection until the round starts again.