Hair bands are synonomous with butt-rock. Hair bands were a phenonmenon exclusive to the 80's and 90's. If the guy used at least one can of hairspray per day, and wore eyeliner, it was a pretty good bet he was a butt-rocker. The SURE thing is whether or not he had a perm, and hair that stuck out/up higher than 3 inches.
These people that consider Creed and Nickleback butt-rock were obviously born in the late 80's or early 90's. Butt-rock is NOT alternative music, it is NOT heavy metal, and it is NOT from the late 90's. Try Poison, Warrant, Slaughter, Winger, White Snake, Guns 'n' Roses...