Do not bother reporting any of this stuff.
This whole thing is based on pure speculation and is inflated to the point it is easy to prove wrong and it will not be taken seriously, specially by a company.
Also keep in mind that sharing accounts, multiboxing or even using ingame macro's is not against their ToS.

That being said, if you dont like someone or feel like someone is impairing your ability to play or enjoy the game, remove or block them. That is perfectly fine.
Just try to be civil about it and present your opinion calmly and rationally if you want to be taken seriously.