Besides the freaky sexual predator aspect which is probably more concerning for women. I think communitys like myspace further increase the anti social nature of the tech generation more than things like msn, forums etc have because you can actually search for randoms.
The whole thing relies on the fact everyone is adding everyone else to add more people and then you say you're friends when they added you for the same reason anyway

.. I 100% agree with the high school/plaza group thing as harsh as it sounds.
.. and the old friends thing.... they arent your friends anymore! If they were worth it you would've stayed in touch, and you should be concentrating on keeping close contact and going out with your current friends instead of telling some 'random' (how do you know what they are like now) 'OMG I REALLY MISS YOU CANT WAIT TO CATCH UP, WOW YOU'RE SO PRETTY'
Just dont see how you can really get to know someone who is as similar as everyone else (Textual form)
.. Music community is completely viable.
I dont use it and not complaining about its existence, i just want to see why exactly people think its actually worth using.
Where has anyone but the supporters of myspace even mentioned Emos?
I totally see your point like some ppl have thousands of "friends" on their myspace. I know - as if your gonna be keeping up with all those ppl! But I still think it's a great way to network and the reach if you wanna use it properly is pretty much limitless.
And besides for all those net geeks that wanna add thousands of randoms to make themselves feel better about not having any real "friends" man let them! What do you care.