This is actually a prime example of why hidden services are not actually anonymous from FBI. Using the 06 attack they can trace to entry guards in a matter of minutes to hours. Then they use a trap and trace on the entry guard to pick out the hidden service. If the entry guards are not in USA (any one out of the three) they will need to spend a tiny bit of time on MLAT paper work, or they could just wait a month or two considering entry guards change every month or two, and its only a matter of time until one is in USA (probably not much time at all considering how many Tor nodes are in USA). My opinion is that hidden services stand a 0% chance of not being traceable by the feds.