Smurfing
Smurfing is a very unhealthy existence in mid-levels. At least as a new player you won't notice the fact that you're being outplayed, but instead believe you're just doing poorly. However, there are some smurfs who while destroying their inexperienced opponents, proceed to have unsportsmanlike conduct and go into /all chat to "BM/Bad Manner" their enemies. This isn't acceptable. It's one thing to get bored of your ELO or become tired of losing on your main account, but then to start making new accounts, and harass new players, it isn't right.
Riot, do you have any future plans for smurfing, or will it remain?