If feds can bust Megaupload, why bother with anti-piracy bills?

That's a darn good question. SOPA and PIPA did have rather broad wording, and provisions that broke security, had no built-in method of redress, and at least major parts of the penalties were totally administrative, no Judicial Branch oversight necessary.

A suspicious person might think "Why, the US Feds are trying to put in place the mechanism for widespread internet censorship!" But that's ridiculous. Three men may keep a secret as long as two of them are dead, as Ben Franklin once noted. Cock-up before conspiracy, as Penn and Teller once noted. Time Will Tell, But Epistemology Won't.