It isn't illegal.
Once people upload anything to facebook, it is lost.
First of all, facebook OWNS that picture. If you remove it, they can put it back.
They can do ANYTHING (Read this all in TOS, check it out if you don't believe me) to your account.
You cannot even "DELETE" your account.
You can disable it to stop people from seeing your stuff, but even then ANY staff associated with FB or Partners can see your profile;
This includes : FB staff, and all partners, which includes Google. Therefore, EVERY google employee, if they wished, could come see your deactivated profile and check all your picutres & videos & everything.
You can take anybody's picture off of facebook & use it as you wish, as it
is no longer theirs once it has been posted.
Myspace, not sure, I only read Facebook's TOS fully.