It's 2013 now. Who has a good excuse to stick a Russian "a" into English text? It's the Google webspam team's job to tackle stuff like that. They read BHW, the technique has been around since 2009 (actually, WPUnique as a domain was registered back in 2007, so the technique was probably in use since then). That's eight years, online. In internet years, that's a dead dog. It would be wise to give Google credit enough to believe they can detect a few cyrillic letters in English text and say "ah hah, blackhat".
And even if they don't do it now ... there's a chance they will, and when they do it could be as big a smackdown as public blog networks.
Besides, what happens when someone takes an article, swaps chars on the stop words and posts it a month before you do the same article? Now its duplicate content again.