ok, so you are going to ban me for picking a champion I'm bad with?
chances are that I'm still better with that than the entire bronze elo. As far as performance go, mine will be ~s5.
So, if you going to ban me for being bad, you will also have to ban ~25-30% of your playerbase.
Next, stalking and taking CS.
This is basically what an ADC does. You spend time with a team mate nearby and take the CS.
Stalking without taking CS.
This is basically what a support does.
Moving from one lane to another, and "taxing" is basically what players do when roaming.
Constantly staying as 1v5 on a side lane in late game is what split pushers do.
Get my drill?
Nothing of the above is a bannable offence as the system can't make a distinction between players really playing the game and people trolling on purpose.
We don't even have a 1-2 week new champion release/rework ban from ranked as they do in LCS. Nothing stops people from picking a hero they got no clue about for the first time in their ranked game and going 0/10/0.
The system can't detect if you used that Trundle pillar to fuck up your team mates or not.
The system can't detect if you used that Vayne condemn to save the enemy on purpose or you aimed for the wall and missed since you suck.
and so on.
That's why, throwing games on purpose is easy. And I don't like assholes winning games. That's why, whenever I find one, I'll make sure they are going to lose <3
If I don't find one, I'll try my best to win.
Oh btw, I've got a 60% win rate with this attitude towards the game.
My advice to avoid trolls is to respect each other, encourage each other, and don't rage, flame or use any behavior that will provoke your team mates (such as banning their heroes).
Since, if you are an asshole, chances are. At least 1 person in your team is also an asshole that can make sure you won't win.
You can win 5v5, when its hard you can win a 4v5. But you sure as hell can't win a 3v6