Someone flaming, trolling, troll-picking, threatening to troll etc. etc. etc. in champ select. It happens way more often than you would think (at least, I encounter them relatively often).
What is the cause? Mental illness, etc. frankly I couldn't care less what causes it.
What are the consequences? 4 normal people losing LP, time, motivation, sanity, ...
What can be done? An anonymous hero can decide to dodge the game, losing LP and getting a time penalty. Meanwhile the troll can go in queue again no problem and do what he likes to do, threaten to troll, feed, whatever when he doesn't get his lane :)
Really, really fair, thanks riot :)