When imply it? after 1 week, after 2 weeks? Or after 1 hour of play, after 10 hours of play?
Because when you log in the first time after reset, your first kill will always be 100% on the same guy.
What if :
example that really happened :
a player keeps spawning PT boats to kill a CV, and an another guy keeps killing him with the ships 5 inchers like 13 times in a row (1 sortie)
Percentage on that player will rise enormously, you will be flagged, everybody will think you're a cheat,...
All this is dependable on how many kills you got before, and at what point...
Other example :
newbee 2 weekers comes in, plays for 10 hours, gets shot like 25 times, manage to get his first kill, 100% kills on 1 player, flagged...
There might be solutions for the above mentioned examples, but I just don't think it as easy to imply as you suggest
