I was against the seizure of the poker sites, and think Americans should be able to play poker for money online. They won't exactly stop us from spending $1000 on lotto tickets in one shot, so what's the difference?
I am vehemently opposed to SOPA and PIPA, because of the way those bills are written.
Megaupload is a bit different.
Computing 101: Always, always, always keep at least one backup of anything you don't want to lose. I feel bad for the people who lost their legal content, and I hope they get it back, but so many people were using Megaupload because they made it so easy to share pirated material, and I really don't think they tried to police it at all.
I do question whether the FBI had the legal right to bring the whole site down. Shouldn't their right only extend to shutting down the servers that are in the US, and block US users from accessing the site? Not that people couldn't use proxies...