I mean think of the horrors you could force upon a simulated brain without any consequences. Simply make a copy, do whatever torture you want to that copy until they are broken in every possible way, then delete the copy and the original would never know you have all their secrets.

Heck, think if someone that was still in their physical body had an uploaded copy online. Nefarious actors could run simulations against a copy of that person's mind to find out which marketing techniques and sales pitches were most effective or which court arguments would sway them if they were ever on a jury.

That doesn't sound very privileged to me. Sounds like some triggers/traps would need to be in place to know whether someone has accessed your mind against your will.

There's so much fiction that deals with this beyond what Stross mentions, though he had finite space. On the topic of torturing someone in simulation (at high speed), see Altered Carbon.

Hmm, would you agree of having copies of your brain tortured repeatedly at high frequency for marketing split testing purposes if it meant you could use a very valuable service for free?