I was playing around with swapping in random cyrillic characters in comments online to mess with people, and someone pointed out that I was a "menace to text-to-speech engines." Yeah, they weren't kidding.
Here's the SAY command in OS X reading "I swiтcнed му кeуboаrd тo Russiаn and swарреd ouт anаlogous glурнs. As for тне wну? Jusт тo мess wiтн you."