How often are Jehovah's Witnesses fake?

Answer 1

Often. Particularly on line, as can be seen that they aren't really "clean cut" Witnesses.

Armed with knowledge of jehova's Witness doctrine and dogma, they appear to try to misrepresent Witnesses.

They may be spotted by the simple camouflage of preceding an answer with "Answer from a Witness". That's not enough to tell, but when the answer engenders distrust of Witnesses as a whole, it is more of an indication.