It's true that many of the people who say that are just kidding around, going like, "Oh boy, we've got some competition here!" But there really are those fans out there that are totally serious about how connected they think they are with celebrities/characters, and about how they feel threatened when someone could come between them (remember Katie Leung, anyone?). It's scary so that's really good advice that Mr. Daniel Radcliffe gave Teresa - the farther she can stay from all that negative energy, the better.

Anyway, I wish her the best, as well as Dan. I don't know much about this film, but I hope it does extremely well for the both of them!