The fact that a warrant and an indictment were issued doesn't mean that these guys did anything wrong. Lots of people who are indicted are later acquitted. The fact that there is evidence doesn't mean that there's enough evidence to convince a jury beyond a reasonable doubt (the standard for conviction in criminal cases) that a crime has been committed. The defendants have a right to present their own evidence to the contrary.

The U.S. Constitution has all these nice phrases like "due process of law" (see 5th Amendment), but they don't really mean anything if the government can take your property away without your having been convicted by a jury in a fair trial where you had adequate legal representation. Nothing terrible would happen if the government were to leave the web site up until a jury convicted these people.

If you were accused of a crime, wouldn't you want to have a chance to defend yourself in court before you had your property taken away?