It's hilarious. I've just learned a bit of Cyrillic during holidays, and even I can hardly stop reading it as "OpeZego" and so on. It must be almost unreadable for people from the many countries with a Cyrillic alphabet.
However, it's extremely rare to see Cyrillic mixed with Latin letters in a word or sentence and have it intentionally mean both, so my mind doesn't interpret it like that. That's why P is not R to me or C is not S...