There's a huge difference between hacking and phishing.  HUGE.  And, uh, any account that you sign into using a username and password can be phished.  Sad to say, but it's true.  Some people have nothing better to do with their time than to make others miserable.
The only way to protect yourself is to change your password a lot, only put code on your page or in your bulletins that you trust or know where it came from, and code your own page and blog.  Most phishing for myspace happens via the hacking of places like Pimp My Space and stuff like that. 

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Knowledge is knowing a tomato is a fruit. Wisdom is not putting it into a fruit salad.