Shakes, is it possible you could work on how you handle that stuff more in the moment? If there's no chance afterwards of anything but it festering, why not confront them in the moment in a constructive way, put them on the spot a bit.. maybe not "what do you mean by that" or "why would you say that" but whatever might be most likely to invite them into resolving it, like maybe "could you elaborate" or "i'd love if you could elaborate on that" ..

With friends and family, I just call them out for it. I don't like to reward bad behavior, even with the convenience of my silence. Those that used to do it in my presence don't much do it anymore, because they've realized I don't put up with it. And with acquaintances, I suppose I feel less mad at them or even judgmental than simply thankful that they've alerted me through the behaviors they've exhibited to me, what I can expect from them. There will always be crappy behavior, and some of it might even be understandable, where people are dealing with situations they don't know how to process. Doesn't mean you have to put up with it though.