My theory is that it's not
only the stories they'd have to beware of, but some of a band's respective threads as well. I know sometimes those of us who post in the Avenged SEvenfold thread have our creepy fangirl moments every so often.
The stories though would be the bigger concern. Luckily in a recent thing I saw where M Shadows was answering fan questions, he apparently doesn' tknow what Fanfiction is, and some fans responded with "Don't ever find out!"
I think if I ever met them, I'd stop writing A7X fanfiction. XD I've wanted to write fanfiction of anothe rband I love, Madina Lake, but I've met them, I've talked to them, I've actually had conversations with them, so to write fanfiction with them would just be weird to me.