Done. I only did the ones that look really similar to Latin characters, and it only applies to English sections. It's done at display time, so it's retroactive.
What does this mean for Russian text that is legitimately posted in English sections?
For reference, the correct translation of "ктo-нибyдь" is "someone" or "somebody", not "who - нибyдь".
Come on, even Google Translate gets that one right. 
Nope, Google Translate can't make heads or tails of it now.

This could be a problem (though whether it's a bigger problem than plagiarism remains to be seen).