I started a bug about it on GitHub: https://github.com/Kroc/NoNonsenseForum/issues/175

Included a first suggestion with a little research behind it. There doesn’t seem to be a lot of software that takes these things into account so not a lot to learn from either.

If anyone here on the forum knows about web development, fonts, or Unicode please head over there and chime in! Programming knowledge is not required, we just need to unearth and get a feel for the problem first: what kind of invisible characters are there? Which of those can safely be removed? How are different languages effected?

:: @Martijn added on 15 Apr ’13 · 12:50

I also like the hash idea, doesn’t 4chan use something like that?