Someone else linked that one, it's hilarious and unsurprising really. Lots of people purposefully avoid certain OSes (mostly linux distros) as well out of respect NOT because of population/userbase of the OS. Lots of discussion on worm/trojan development forums over the years.
If you are a Russian hacker, you probably don't want to piss off a Russian mobster who has the capability to take you out, and the contacts within Russian intelligence to identify you.