This could be really misleading. I never boot people right at the limit, but I am often the one to boot people at 10 or 12 minutes in a 5 minute game, just because nobody else has done it. So my boot % might appear to be unusually high...

Then it won't be misleading at all -- it'll tell us exactly what you just wrote about yourself. Although it seems you're a bit uncomfortable about how other players might perceive your actions. Maybe you'll rely on vote to boot moreinstead of direct booting "just because nobody else has done it". Course that's up to you.

Just a thought:

I play plenty of 1v1 games and often times my opponent doesn't surrender and therefore I must boot to win so I can move on with my day. Dealing with this circumstance my amount of boots would be abnormal and it may cause people not want to play with me even though I rarely boot for the sake booting. I get where you're coming from in terms of the excessive booters who boot right at the boot time for the sake of giving them an extreme advantage in a game, but putting the amount of boots in a players profile is just dumb. There's a blacklist for a reason.

Duke, just had a thought.. could make the boot ratio's similar to the play time.. show an average of the players boot percentage as i described before, up to 100% then put a list that shows 0-5% 5-15% 15-30% etc. so that even someone that fakes the ratio by doign a few 100% ratio's, would still have it shown that he is a repetitive min boot time booter...

and then perhaps even a open seat pre-requesite added in for such a thing.

I got booted for being literally 0.5 seconds past boot time. We were playing 2 v 2 v 2
And then they booted the other team too
Luckily my AI owned their ass haha ^^