A huge amount of western society and the way we run institutions is based on pretending everything meets some quasi victorian moral standard and is all proper, everyone consents to and supports how everything runs and everything is fine and dandy when that is very much not the case and people put up with a lot of it because they have no better option.
In light of that what I see happening in the short term is that every institution will start screwing people based on information that basically doesn't matter since that's kind of what they're already set up to do with that information but don't except in exceptional cases since those are the cases in which that information makes it back to them.
Imagine some business owner opening a new location, some social worker renewing their license, some civil engineer creating plans on someone's behalf. All those people need to deal with institutions that in the "normal" case pretend to not have large discretionary components in order to get the public to put up with them, but do in practice have such ability. Now say those institutions pay for some LLM based "who am I dealing with" service that finds everyone's pseudonymous posts and whatnot.
Well, all of these people wind up getting given the run around because even though they do fine work that meets the rules, knowing how the sausage is made has made them jaded and given them opinions that make the institutions they have to deal with want to screw them. The business owner gets given the run around because it turns out he believes the institutions he's seeking permission from are a corrupt racket who's members ought to be hung from the overpass. The social worker gets denied because their career has turned them into a "defund it all and when faced with real consequences most of these people will shape up" type. The civil engineer's plans get rejected and he has to go around in circles because he's been posting about how in light of what corporations with good funding can get approved and the impact thereof it's unconscionable the stuff they try and enforce upon individuals and engineers ought to pencil whip anything that isn't clearly F-ed up.
And so, all these people have to waste time and probably a low five digit sum of money fighting the BS. This would be fine perhaps if these people's conduct was so egregious it made it back to the institutions on it's own (like say some doctor who's preaching quackery on youtube may get his license yanked if he amasses such a following the board hears about it, that's the kind of stuff institutional discretion was set up for) but no real good social interest is served having an LLM dig up petty dirt on everyone. However, the LLM service peddlers stand to make a buck. The institutions stand to make a buck while washing their hands of responsibility. The lawyers who'll fight on wronged parties behalf stand to make a buck. And in the process they can all pretend like society somehow benefits from this enhanced scrutiny when in fact they're just making mountains out of mole hills.