intentional feeding should be a 2 week ban minimum

I reported someone for intentional feeding (3-17-5, said they were going to int, and asked for ff at 5 minutes in). I was surprised to receive a notification that they were punished in the client. However, 24 hours later and they are already playing again??? There is no excuse for inting, this guy single handedly wasted everyone's time in a game that could have been winnable. Sometimes people flame a bit when they are pissed off and maybe cross the line. Smaller bans are reasonable for this, but inting? Should be a 2 week ban 1st offense and perma ban 2nd offense. These people completely ruin the game. Even if you are mad, you can at least mute your team mates and keep trying.

edit: maybe the ban was for what they typed in chat and the system still has not banned them for inting.