Hackers don't go to "rape you in the ass" prison. They go to places like this: http://en.wikipedia.org/wiki/Federal_Prison_Camp,_Yankton

I am not sure about the district Swartz is in, but I've known folks who went to FCI Lompoc (for non-violent felonies -- albeit ones with actual victims and non-trivial monetary damage, i.e., they did deserve to go to prison fair and square). While federal prisons are it's far cry from California state prisons (which, even at low security levels, are far more violent than state prisons -- it's not uncommon to take a longer federal sentence as opposed to a shorter CA state prison sentence for this reason), it certainly not "club fed". Swartz would have certainly have been beaten to a pulp on a regular basis, would have been treated to diesel therapy, and while possibility of sexual assault would have been low, it would be far from remote.

Federal correctional institutions (FCI's) are a step up from Federal prison camps (FPC's). They are generally used for drug offenders and somewhat scarier people. For reference, the hacker serving the longest sentence for hacking in history (caused tens of millions of fraudulent CC charges) is serving it at an FPC.

Ah, so apparently I learned something new: there's a FPC attached to FCI Lompoc, which I am guessing is where Mitnick served time when he was at Lompoc (for his earlier convictions, rather than the most infamous one) as well as Captain Crunch (I am guessing he did not offer Energy Transfer Massages there, however).

http://www.bop.gov/locations/institutions/lox/index.jsp