Bans?

I know Riot does various chat and account bans. I wish we could see if an Account has been banned temporarly before (such as scouting and such) and does Riot do IP bans? I mean, I've run into countless people who rant about having an alt as the flame. Does Riot even attempt to just ban their router instead of the individual accounts? Sure it's a free 2 play game, but if they keep smashing the hammer on a hacker or flamer who has multiple accounts. What good does that do? Something like this might help block people who steal an account if theirs gets banned. Just in general, curious on Riot's approach to the concept(s). [sg-lux-2]