The morality of Escape Plan is insanely questionable, as this supposed prison housing the worst of the worst global terrorists seems to contain no actual bad people at all - everyone's a noble warrior type, and over half the inmates look like nothing more than a disproportionately Caucasian group of unemployed pro-wrestlers. Even the torture, such as it is, consists of Vinnie Jones in a black mannequin mask beating you up, or a hose being stuck in your mouth (waterboarding is too elegant, apparently) - a far cry from the horrors of Abu Ghraib, or even the enhanced interrogations of Zero Dark Thirty.
When the good guys start massacring prison guards, is that moral? We get a token explanation that the guards are mercenary Blackwater types rather than U.S. military, but still - is wiping out our guys in the service of letting every Black Ops prisoner go really a good or sensible idea? Whatever your opinion of our legal process, does anyone really believe all such prisoners are good and all security measures against them are bad? Best you not think too much on this detail...the movie sure doesn't.
Still, if we were to make a list of every morally questionable thing done by action movie heroes, we'd be here all night and then some. It's not quite the point here.
Arnold. Stallone. Hitting. Guns. Catchphrases. If you want more, keep holding your breath; for me, this is guy-movie junkfood far more rib-stickingly satisfying than either Expendables or The Last Stand.