Just because they say they are real, it dosnt mean they are. There are alot of fake's that look real, because they have personal pictures. But usually they have been stolen from somewhere. Like Indiana Evans dosnt have facebook... the accounts may look real but none of them are her.
A fake even fooled the press into thinking it was her account & they wrote a story from thing's "indiana" said on there. her manager had to get in contact with them to say it wasn't her... he said Indiana has no social networking site such as twitter, facebook & myspace.
Also Todd has an official myspace he has for fans to get in contact with him, he has given the link out in interviews www.myspce.com/toddtj
he has written on his myspace that he has no facebook & that they are fake.
Im not sure about the others that you mentioed, but just because they say they are real, it dosnt mean they are. Anyone can say they are someone they arnt on the internet, becasue you cant see who's behind the screen!