Yup, Another Thread: I Hate Addons and SE Needs To Ban Players Who Use Them!

[Burmecia]

Yeah, you conveniently missed the part where later in this thread the OP finally caved and told people the mechanic that roused their suspicions and people gave them multiple signs(including an obvious cast bar) that would explain the player in question's movements.

Then op's other tank had the castbars for help and in fact played within their window of opportunity.
Refusing to read the whole thread is convenient, I admit that.