There are plenty of trolls in League of Legends and sometimes it is fun to return a little be of the trolling to people on your team. While trolling is stupid and bad, it can be fun at times and here are some ways to do it.
I am a troll on that game i find it is fun and amusing seeing people angry haha
x: hey bro help me on blue
me: sure let's go
x: hey bro why youre not hitting the golem?
x: "A summoner has been killed "
me: -kills blue-
1) Pick your Champion. Who cares about team comp?
Trolls do not care about team comp. The only concern of a troll is what role he wants to play and everyone else just has to shut up about it. In champion select do not talk just pick your champion even if the role is filled.
2) Pick troll champions. Karma is completely viable in ranked.
Who said karma wasn't op. Karma is the best champion in the game. The key here is to not tell your team that you are going to go your troll champion until after they ban. This way you can be sure that they do not stop you from getting your champ and trolling. Be sure you own plenty of bad champions so in case this does happen you have a back up.
3) Pretend you don't speak English.
This way people can't get upset that you aren't communicating with your team but you have to have a subtle hint that you definitely do speak English. By doing this your trolling really comes into effect.
4) Afk at base until minions spawn.
Don't make any sudden movements or type for the beginning of the game. Your team will assume you are afk and will begin to rage about it. In no time you will be hearing the "GG afks" and the "Report _____ afk."
5) Forget to buy items.
No better way to start the game then with no items what so ever. Just raw dog it and come to lane like a boss with absolutely nothing. All in a trolls day work.
6) Don't give your jungler a leash.
He can do blue by himself can't he. Just pretend you don't know what's going on and don't give him a leash and then when he gets executed. Cry report and watch them start to rage.
7) Steal you junglers experience.
Give your jungle a leash but just sit buy him until he kills the buff and take the experience. This way he will be a level behind and trolled. You probably wont get any ganks but thats okay. We are trololololing.
One of the most notorious attributes of a good troll is the feeding. Feeding all day every day. Feeding is probably the easiest and most effective way to get your team extremely mad and if you combine it will all the other troll moves you will be golden.
9) If you are supporting steal minions.
Make your ranged carry fight for every single last hit and pretend you don't know you are doing anything wrong. Tell him you need gold and just proceed to annoy him for the rest of the game.
10) Give the other lanes free kills.
Tell your team you are ganking mid but when you get there just purposely miss all your abilities and dive the turret. And if that's not enough rage at the person you ganked for because they didn't back you up well enough.