OP I think it might be interesting to try and find out more about why these fans had the previous reputations. Not that I don't agree with others that you maybe could defend the person who is considered a bitch, but I have known and do know people who in fact are vile bitches, but would do all those things you describe. I've been treated very badly by a colleague, who would drive me home or lend me money, and do the same for anyone. Doesn't stop her from being the most horrible work bully I've ever met. Some people can come across well until you get to know them, or work with them for example. It may be that people who know this person better have seen a nasty side, which wouldn't come out at a meet up.

Not that it matters hugely if you aren't going to pursue real life friendships with them, but it can be interesting to find out what they've done to earn those reps.