Congrats on the new gig, Lizzy!
I think you rightly identify the ability to behave 'unlawfully' as one of the great draws of the gaming medium.
There's something deeply cathartic (dare I say, escapist) about being able to shrug off societal norms and occasionally behave in an outrageous fashion. It's one of the things that makes gaming - for lack of a better word - FUN. Whether it be throwing newspapers at senior citizens or setting off nuclear weapons in Megaton, there's something undeniably enjoyable about the freedom to play the part (or not) of a sociopath while gaming.
Who hasn't, when playing a 'morally ambiguous' game like Skyrim, GTA or Mass Effect, enjoyed the rush of occasionally just being an arsehole? Whether it be quicksaving before going on a rampage in Whiterun, punching a journalist in the Citadel or just randomly ploughing over pedestrians in Los Santos. The ability to indulge in such outrageous behaviour and experience the subsequent consequences is what separates gaming from the linear experience of film or TV.
Conversely, it is sometimes rewarding for gamers to subvert these expectations and behave 'well' when faced with tantalising opportunities to wreak havoc. Some of the most fun I had playing games like Deus Ex or Dishonored was ignoring my ability to commit mass slaughter and trying my very best to be a good boy and avoid detection.
As you correctly identify, this 'freedom of choice' is integral to the experience and should continue to be celebrated as one of gaming's greatest assets.