As long as it does not lead to actions which harm innocent people? Nothing.
But I’ve known too many cases where it has. Beyond the personal harm I’ve suffered, I have friends who’ve been assaulted, almost confronted a transwoman who was falsely accused, and my brother was convicted of a crime he didn’t commit.
And most of the time these occurred not because of intentional deception, but misunderstandings and narratives which were endorsed by someone else.