Everyone juices at the Olympics. It's just a matter of degree - and not getting caught.
The Russian thing is just political. The Russians weren't even allowed at the Eurovision Song Contest this year, for Cthulhu's sake.
This is just an anti-Putin decision, though a certain orange egomaniac is doing rather well at isolating us from the world also, so it's only a matter of time before they start banning us from events as well.