Oh, really? Instead of argument by assertion, let's try an idea.
Your neighbor comes and takes your bicycle without your permission and won't give it back. Theft? Sure.
Your neighbor comes in with one of his friends, and they take your bike together, same circumstance. Theft? Sure.
Your neighbor comes in with 2 of his friends, 3, 4, etc. At what point is it no longer theft? 51%, you say? What magically happened at that point? I say nothing: theft is still theft, irrespective of the claims of the majority.