Batman curse?

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On my break I was watching Showbiz tonight on CNN and they were talking about the "Batman" curse. They are talking about Heath Ledger's death and now how the FBI wants to talk to Mary-Kate; the charges filed against Christian Bale by his mother; and finally the serious car crash that Morgan Freeman was in last night. What does anybody else think of this curse theory? I think it's just silly nonsense and everything is just an eerie coincidence.