The main reason I would want to know is if it really is not clear to me why the thread was locked/deleted, because I really do not want to inadvertently create a thread or post on a problem subject.
If I have a question about why a thread was locked, I PM an EHellion or two whose opinions I trust & have been on the board longer than me, and I have received PMs from OPs asking for my opinion re: the appropriateness of the thread.
Sometimes an OP can start a thread where the OP is fine, but it veers off into something contentious, so it gets locked.
Some of the thread topics that are likely to get locked IME b/c they veer into contentious territory:
reproductive choices (the Duggars, Octuplet Mom)
Should guests where shoes on or off in the house?
Shopping carts: return to cart corral in the parking lot, or leave next to your parking space?
Serve or not serve alcohol &/or meat at parties/events
Strollers on buses
I can't think of anymore off the top of my head.
Political posts praising/denigrating any political figure or policy are not allowed. Posts about scrabble etiquette/tips/techniques/practices aren't allowed, it doesn't matter if you are referring to one-game Scrabble partner or your spouse.