I once had a thread locked that I had created (no, come to think of it, there 2). After the embarrassment wore off, I was able to look at the threads a little objectively, and Hathor (BTW, the Egyptian goddess of all that is enjoyable in life!), I really don't think it had anything to do with me. One had veered abruptly into legal territory, and the other had two posters who took opposite positions and had chosen to snark it out. So, Hathor, don't take it personally, if there was no comment from a mod, it probably had nothing to do with you.
I also have to add that I was looking at some older locked threads today, all from this spring and summer. I definitely noticed a pattern where one person in particular was being attacked or dogpiled or generally denigrated. Oh, dear, that person was one of the targets! And then another one: that person was a target also! Members who had been around awhile would start an innocuous thread, and it would shortly be locked. I would read it to see what had happened only to find absolute vitriol being spewed on the OP. Stuff was being dredged up from years ago. No wonder these last few months have felt like there was so much free floating hostility and paranoia.
In terms of mods getting back to us, I once questioned a mod because a thread disappeared and I had never seen it before. I received a timely response which confirmed that I had not imagined the thread. A very polite interaction.