Just because ONE band member likes the song, doesn't mean it'll be comming back. There are five other members in the band, and they may not feel as strong about the song.
Don't Stay has pretty much been removed. It was gone for much of 2008, and all of 2009. Papercut, again, they have already removed it. Although there is a chance it may be back for 2010
If LP played every song that fans said were "Fucking Awesome" or "Fucking Great" The set list would be 2 football fields long, at least. HHM hasen't been played since 2004, so its unlikely to be brought back. Same with P5hng Me A*wy.
QWERTY won't be played. Why? The band said themselves that they couldn't agree on which version to play, the live or studio versions. They did a hybrid of the two for a few dates in 2007, but they didnt like it, so it was removed.
Mike said that the HTEP songs won't likely be played, due to some of the band members not liking them. NRL, Mike already said that he can't sing the song live. They rehersed it a couple of times, and they didn't like how it sounded.
Hopefully, real LP fans will like the song, regardless of it appearing in Twilight. Even if it is popular, people who got into LP because of that song probably won't like being at their concerts, since they will be playing heavier songs than LOTAR. And if it's erased, I don't think anybody (other than the Twilight junkies) will shed a tear.