I think reading the work of teenagers is pure, uncomplicated fun. If you had guilt in that, your perspective would be off.
Angry teenagers (along the lines of Just Rage posters, Slipknot fans, terrible poets, et al) are really simple creatures to assess. They're spoiled, undereducated, hormonal, opinionated, and absolutely filled to the brim with bullshit. And the constant need for praise and feedback means they're not interested in writing a poem so much as they want somebody to say "Hey man, nice poem."
I think it's easy to love because it's easy to identify with it. I was a particularly angsty teenager, and now I find most of those traits charming. Let me stress that I find them charming in teenagers. If you're 26 with two infant children I'm far less forgiving of your stupidity, but if you just want to write a screed about "CONFORMIST SHEEPLE R IDIOTS MUDVAYNE RULES!" it's fine, because we're all operating on the assumption that you're still figuring shit out, nobody's holding you to any of this, and presumably you'll be able to come back to this later on and realize you wrote something foolish.