Going by that logic, and calling these people unethical, let's turn that on its head, let's see your real name!
Seriously, trying to evoke some sort of ethical argument on an internet forum is like trying to fortify that Wikipedia is actually a source of sound academic writing.
The thread itself looked like it criticised her specific teaching practices, yes I know it's hard to comprehend, but a tutor/lecturer's ability to run a tutorial is actually a very intrinsic part of their ability to facilitate in the learning and teaching of their students. Yes there were a few personal attacks, but for the most part the consensus seems to agree that she had a few issues with her teaching style.
It's all good and well to hold the moral high ground about how certain things are unethical/immoral etc, but truth is, the content on here is no worse than what students would be discussing over a cup of coffee or whatnot and frankly I'd be quite surprised if you yourself were immune from such practices.
A better way to go about correcting the misconceptions on this forum would've been to come in without that moral-high horse, and actually explained to people why she isn't the person that the students perceived. Instead, you took it upon yourself to call out people for thinking differently to you, then suggested that they were in fact legally and ethically wrong. If you do believe that, then by all means outline your case, I would enjoy seeing it.
Till then, lighten the fuck up, its the internet.