So you also remember how fast rumors and gossip would spread without technology. It's a thousand times worse now. As a parent, I'd be happy to play the bad guy if my kid thinks that's the best choice in their social dynamic. They know better than I do what kind of risk of social backlash there might be.
It's hard to be a kid. Anything that I can do to give them a leg up is okay. I should also mention that that kind of bad guy ploy is only part of it. Talking about situations before and after is a much bigger part.