Can you get banned after trolling cause your teammate banned your champ (in normals) ?

Of course.

?

"Can I get banned after trolling because..." absolutely ANYTHING you can put after the because still results in a yes.

If you do anything against riots terms of service yes

yes

Trolling is punishable. Having a childish temper tantrum because someone else did something, anything (including banning your champ); does not excuse you.

Yes, you can.

Yes

Reading through these comments

https://thumbs.gfycat.com/PastelBriskBlackbuck-small.gif