I think instead of you calling them as red flags (which they are!), you could simply call them as criticisms of the project till it's clear as day to you that the project is a scam. That should help you with the stuck up bitches who go apeshit when someone uses "wrong" words. They don't even pay attention to the context.
It's not FUD when it's backed by valid reasons. Those who call this as FUD are retarded.