One time a guy said disabled people should kill themselves for the good of the gene pool so I told him eugenicists should be publicly flogged and I got banned for inciting violence, and then I got IP banned when I told the moderator there's no point banning me because it's trivial for me to just use another account (in more colorful language). I'm also pretty homophobic & transphobic so I've caught a number of bans for that sort of thing before. My current account is on 1 warning atm cus I said something about feminism, I don't recall what it was.
I'm not sure why you would think being banned should prompt self-reflection? It's not like any of my reasons for believing the things I do has changed, and it's not like being banned from Reddit really has any negative consequences for me.
Getting banned 16 times from a social space is a pretty clear message that you're not welcome. Equivalent behavior in meatspace would likely get you trespassed from the property or arrested.
I'm not sure why you would think being banned should prompt self-reflection? It's not like any of my reasons for believing the things I do has changed, and it's not like being banned from Reddit really has any negative consequences for me.