I actually made this back in August but never posted it until now.
I agree with your point; many of the comments say that simple regex filtering can solve it, but they seem to ignore that it would break many languages that rely on these characters for things like accent marks.
Feedback from college professors:
https://old.reddit.com/r/Professors/comments/1p58evc/defeati...
I don't have any particular opinion about this project itself, I'm sure there are legitimate use cases for wanting to trick LLMs or obfuscate content etc. But if these sorts of projects are a litmus test for AI skepticism, I'm seeing a clear trend: AI skeptics are losing ground on HN.