Glitch that freezes your screen

The user " II Alondite II " told everyone in the champion select screen to 'open up your masteries screen and hit the space bar a few times to see your kda'. Not going to lie, I bit, because I wanted to see what would happen.

So apparently if you hit the space bar (he said '3 times', but who knows if it's more or less) while the masteries screen is open, your screen freezes. Watch out, everyone. Riot, see if you can fix this?

Not sure if any punishment could/should be meted out. He did abuse a bug and screw over a fellow player, at the end saying he needed someone to dodge because he was in his series.