Let me explain for you :). First game, our first pick locked in Lee jungle. Then, the trollo locked in shaco jungle. He said, "sorry Lee, but im going to shut down their jungler." This forces our Lee to play a champ in lane that he is not comfortable with. I give him his desired lane left out of the two, and he tried to play as best he could. I do not blame him for losing lane hard. Sets the team at a huge disadvantage when someone is not playing what they locked in to play. The Shaco then proceeds to gank a total of 0 times. Instead, he just sits in the enemy jungle dying early. After his 3rd death, he just quits playing for the last 10 or so mins. Only coming out to pop the 10 HP malph that was recalling on a ward. I will also add here that he literally said something like, "go ahead and report me, it doesn't do anything." That is the problem and that is the reason that people troll. They know there is no punishment for it...as long as they are "nice" in chat.
The second game mao was just being a dick. Literally farming jungle the entire game, even while the enemy team took inhibs and pushed our nexus. Basically, he was afk. If you don't gank, that's fine and I'm not going to blame our other lanes losing on you, but if you are farming jungle while the enemy team pushes inhibs, you are 100% trolling. He was pissed because he was playing poorly, like 0-3 start to game, and we wouldn't ff vote. So he decided to afk in the jungle.