is that legal?
what have they done wrong?
if they have been convicted of a crime, done their time (if any) and been released then... they have every bit as much right to be on myspace, facebook or anywhere else as the archbishop of cantebury.
i'm sorry, but if these people are not actively (and proveably) taking part in criminal activities, then what justification is there for 'kicking them off' ?
if this is happening based on peoples past activities, which they have been punished for, then its a disgrace. might as well boot off everyone who has ever commited a crime.
2 possibilities, either:
a) they still pose a danger, in which case they should still be banged up
or
b) they no longer pose a danger, in which case myspace etc. should keep their noses out of it.