Yep. This is clearly a case of the punishment being blown out of proportion. He didn't swear, didn't abuse anyone, or 'obviously troll'. He was the first ADC so clearly he picked before the others after him.
Just because you make it to the tribunal doesn't mean you deserve to be punishished. This is exactly the type of attitude the OP was referring to. And you've all just confirmed this by saying 'wellllllll... if you make it to the tribunal then you obviously deserve to be there, no matter what I see/read'.
People hand out reports like candy. ****, I know people that report 'unskilled players' every single game. Just because someone lands in the tribunal doesn't mean they deserve to be there...
tl;dr Tribunal is a broken system