HOW TO GET PEOPLE BANNED 101
At champ Select wait until all lanes are filled Then pick a champion at last second to copy a role someone else picked (If someone called mid go mid) When game starts follow them to their lane and wait for them to start complaining. If they stay, just steal their cs and exp while spam pinging them over and over. If they Leave lane follow them everywhere, if they don't give a few kills to the enemy mid.
By this time the Typical person will be mad and will be asking for reports This is very important, say NOTHING in chat (so you are immune to punishment) Sometimes you get lucky and get the whole team cussing and insulting , don't worry this is a bonus.
At the end of the game, report all team mates who got pissed at you for ruining 40 minutes of their time, This will flag their accounts so they will either get punished if this has happened before to them or will start the person on their way to getting banned. Congratz, you have now performed an honorable duty ( Riot Logic) and you will have that asshole player who called you a moron for stealing his cs and exp while also spam pinging him all game and feeding his lane banned from the game eventually due to your reports.