They are not Glam Metal, the only Glam Metal band on that list is Mötley Crüe. You should be really an ignorant if you put them in the same tag. You can't put Black Sabbath, Poison and Skid Row in the same sub-genre, they are totally different. Any idiot can see the difference.
Real rock? Good joke. You listen Alternative Rock, and their main influences are Punk Rock, so it's not real Rock. Real Rock should contains influences from the old Rock And Roll, who has these influences? The Hard Rock.