I would be fairly surprised if a post-collapse society would be against people cracking DRM, any more than they would be against people taking crowbars to whatever buts of rubble seem worth salvaging.
There would be an obvious “anti” party if there were still someone in a position to exercise control by using the legacy systems, they would presumably be against someone messing with that; but unless the scenario is a very, very, gentle collapse, I’m just not sure that their would be such people(and the few exceptions would find that the costs and risks of travel and difficulty of communication makes attempting to grow fat of tithes tricky).
DRM systems are generally designed to fail brittle(since if you don’t default deny, just faking a network outage during the authentication step becomes a viable hack); and they tend to rely on a lot of 3rd party moving parts. In many cases(Denuevo in games, say) the vendor doesn’t even control the DRM themselves, they license it from some other guy whose authentication servers are probably a smoldering heap of rubble. Even if it’s developed in-house, knowledge is likely to be spread among several people, access to keying material tightly controlled even before the robot wars, and infrastructure for authenticating users generally probably dependent on a bunch of network infrastructure and servers handled by ops(or farmed out to Amazon, and likely on fire either way).
The original vendor might well be in a better spot if they still have everything they need to produce a clean build for their own use; or as a superior competitor to the cracked copies; but their ability to re-establish that tasty licensing revenue seems tricky at best.
All that said, in an environment where swift transmission of cracked copies, and just-fucking-google-it-powered techies are no longer possible; I can see people with relevant knowledge doing some obscurantist hoarding to increase their value as hackers, rather than toiling mud slaves, to Bartertown’s warlord; I just can’t see the fight being between them and the old-world copy-cops rather than being a contemporary dispute over how well they will be compensated for their work, how indispensable they think they are vs. Lord Humongous thinks they are, and similar areas of labor law.
I can also see some situations where malicious (or hapless and accidental) damage could result in being greeted with roughly the enthusiasm reserved for a London arsonist in 1666; but not because you dabble in things beyond your station; but because you dabble in exactly the thing that just ruined our day by no longer working, so we blame you. You don’t need to hold a specialist in superstitious awe to recognize him as dangerously capable of subject area malice or incompetence; and have a corresponding interest in supervision, moral suasion, and brutal punishment. To some degree we already try to do this; with licensure and professional censure for things like doctors and lawyers(along with lofty ideals to try to discourage people from needing that censure in the first place); given that regulatory capture doesn’t work as well without a relatively strong, bureaucratic, state to capture, enforcement would probably get more enthusiastic, if more unsystematic, after the nanite plagues.
Also: the Brotherhood definitely wouldn’t hold your haxxor skills in superstitious awe; but they would definitely kill you up with the extremest of prejudice for being a script kiddie.