Leaving for good reason

Would it be possible/ a good idea to have a system in place so you can explain why you're leaving a game in progress? I say this because I've had a few games where the lag has made it unplayable or something along those lines, now sometimes this is my fault (my internet is going slow for whatever reason or my computer, you get the picture) but sometimes I feel that it may be Riot's servers (not certain of this, just assuming because of the situation at the time). The problem is that you are punished for leaving games (rightly so) but what if it is for good reason? (teammates being abusive, lag, anything that makes the game not enjoyable) Would it be good to have a system in place where you can say why you left the game after? E.g. Teammates harassed me all game until I felt sad for being in there (of course report them but you get a black mark against your name as well). That way if you have too many leaves then a moderator or something could check to see why you've left and maybe have a quick look at the game in question to see if you were honest with your reasons, then if your reasons were good and accurate then you don't get penalized? Just a thought, might be a terrible idea but hey, might as well share :)

Thoughts?