So...If I didn't get it wrong, BAN means SE doesn't encourage FFlogs, then what you saying means "the site and how player using it is not allowed by SE, but I insist it should exist in a stealthy way"?
(Sounds like "Don't fight in public or you got caught. Fight when no one see you and your victim."

)
I thought SE allowed these action and using of logs according to the previous replies... Now I totally don't understand why judge other players with "things can't asking others to show" is ok.
Seem like SE DON'T want a player have other players logs(or judge them by logs), otherwise why they ban someone asked and got reported?
You make me confuse again, thanks bro
Oh, Almost forgot :"FFlogs already has the option" indeed, but not by default, which means
who don't know the site can't do anything about it.
Their opinion had been ignored but still affected by the site :they could been kicked or rufused cause they didn't upload logs with better performance, whether they do have or don't. And like you said asking logs probably get banned, they won't be told why they got kicked.