This is a good example of their older work; this is off of 21st Century Breakdown. Huge difference in the sound and the tone of the lyrics.
Punk rock is my favorite genre; I know punk when I hear punk. So yeah, you tell these people, because they don't know what they're talking about. They act all bratty on stage (they're punk, that's what they do), but they are adults and do have lives.
EDIT; Give me a break, I'm using mobile Internet.
Welcome To Paradise is off Kerplunk!