I've never been a huge rap fan, but I can at least respect some of the artists who put some feeling and soul into their rhyming, and don't fill it with swearing and only rap about mistreating women and commiting crimes, doing drugs, etc
Yeah, cuz you know that's the entire content of LP's rapping...
As far as "it's all power chords and those are totally easy"; it's not the difficulty of the music that makes it good music. Hell, you could be flying up and down scales with key changes every bar; but that doesn't make it good music.
Sure, difficulty can impress people (a la Santana...I don't play guitar but his stuff seems pretty damn hard to imitate); and sometimes it can sound really good (again to Santana...); but if you aren't playing good music, it doesn't matter how hard it is for you to play.
Your idea that LP is "sub-par rapping"...well, I guess that's a matter of opinion. In all honesty, I think Mike Shinoda is one of the most talented rappers on the (mainstream...I could care less about the 'underground') scene. Not only does he *not* swear in his lyrics; but he *does* put feeling and soul into his lyrics..then again being someone who could obviously care less about lyrics I don't see why I'd bother arguing that one... On top of his rapping, Mike also does to quite a bit of the band's production work, writing (not just lyrically), and other such things. Little known fact - each member of the band has graduated from UCLA....with musical degrees if I remember correctly.
I have no problem when people dont *like* certain kinds of music or certain artists; but when you just say the band sucks, it's not only ignorant but insulting to them as well.
By the way, I can give you plenty of adults who are musicians in one respect or another who do like Linkin Park or POD or any one of these rap/rock groups... (no they are not 13 yr old wanna be musicians...hell I'm not even 13...)
Oh, and you can also add RHCP and Incubus to the list of 'teh eval rap/rock phenomenon"
 btw I never have been and never will be one of them "depressed looking teens falling off skateboards". I think most of those people are the 'hardcore kiddy punk' genre...the Good Charlotte kind of people.