Not only that, but some of the devs that seem to bitch the most about "poor PC sales" aren't just making a console game that's a crap port, but they are releasing it for the console long before the PC! News flash: Many people have a PC AND a console, sometimes more than one! As such, if you release on a console first and a PC much later, well expect your PC sales to be weaker than your console sales by a large margin. This isn't because the PC users are being evil pirates, it is because many of them already got it on the console. They aren't going to go buy it again for the PC just to make you happy.
I too get really annoyed with all the piracy bitching. Ok, if it is such a big problem, then how come so damn much money is being made on PC games? The PC is still the biggest platform, bigger than any of the consoles in terms of game revenues. They over all console market is bigger, of course, but that's three platforms against one.
It is just whining and trying to deflect responsability for making a poor product. Goes double since it isn't as though console piracy is non existant. You fire up your favourite torrent site and oh look, there's an Xbox 360 category, a PS3 category, a Wii category.
I really think more often than not it is their weak attempt to explain to shareholders why their game isn't doing well. They don't want ot admit it isn't good, instead they'll try and blame people downloading it.