No- and I realize this is far more difficult for those who fear getting stuck in a bad situation- I mean that it's entirely possible that the guy was not evil when they met.
There was no roping. No lying. No coercing. That he was a decent person and everything he seemed to be. And THEN made bad choices.
I see this bad anthropology (in the religious/theological sense) all the time especially in terf and secular right circles. The idea that someone just IS good or bad inside, and that if you just somehow manage to suss out the bad ones, you will be fine. And if that doesn't work, it's likely that the bad person deceived you on purpose.
The reality is that everyone, at every moment, has the capacity to stop choosing good and begin choosing evil. Now, the up side is that means the opposite is also true- they could stop choosing evil and begin choosing good.
But it does mean that when you see someone hitting rock bottom, you don't get to just throw up your hands like a Calvinist and say "whatever, he was always destined to be bad." It means a former good person has made a lot of very bad choices. And could conceivably convince others to do the same.