That's sort of the whole point of this thought exercise, no? If shame worked in an environment with anonymous/pseudonymous users, then we wouldn't be here. The only people you stand to harm are the ones who attach their real identities to their profile (and they're more likely to be good faith IMO)

Besides, I've seen plenty of profiles here on HN who advertise their real name and espouse (in my view) awful takes that would most likely not fly in real life. I'd recommend reading this article[0] for an example of when people, with their real names exposed, can still cause a shitstorm of misunderstanding.

0: https://lwn.net/Articles/973782/