Mind Rape: See, in essence, And I Must Scream. The penalties are commensurate.
(Note, though, that this doesn’t apply to the standard means of extracting information from unwilling minds among technological sophisticates (Mind Probe); namely, pulling a copy of the mind-state vector – which is about as painful as getting an MRI, because that’s essentially what it is, which is to say, not at all – and then extracting any data you need from it by static analysis. Invasion of privacy, yes, but any side-effects are purely psychosomatic.
That this is possible, incidentally, tells you everything you need to know about the sadistic bastards who use perverted sophotech for regular-style torture-interrogations.)