If you pass out - say, you are sunbathing on the beach and fall asleep - and I see you are unconscious, and rape you - you accept that it was irresponsible of you to fall asleep?

Blacking out drunk isn't the same as sleeping on the beach, unless you are a REAL deep sleeper. In which case I don't think you should be sleeping on the beach. :/

Do your coworkers have the right to run a train on your unconscious body?

I work with several guys that would do that when I'm conscious. >.> To be fair it would be, I hope, an accident.

Or does it only apply to alcohol?

We have a WINNER!!!

You knowingly put a substance into your body that has a side effect of making you unresponsive for long periods of time while in a place surrounded by people you don't know who are also imbibing the same substance.

If so, have you ever been very drunk? Where you would have been unable to resist, slurred your speech in your refusal so that it was unclear, or have you ever passed out while drunk?

Nope. You know why? BECAUSE I DON'T FUCKING WANT TO BE RAPED!!!! (even though I'm a guy it can still happen)

I get drowsy after half an ale, so I know it wouldn't take much for me to be out for a while.

Or it seems you're saying drinking alcohol is tantamount to 'consenting' to rape.

What we, or at least I, are saying is that when you put yourself in a situation where you are vulnerable you share part of the responsibility of what happened. It's not your fault that you get raped. No one should be raped, but if it does happen and you helped facilitate it then you should grow up an learn that your habits need to change. Drink with friends, drink at home. Don't got to frat parities or bars and get shit faced by yourself.