Eurgh, I dont even wanna click that link at work. But it made me almost want to be sick when I watched that TV program.
Yeah, there's a site someone sent me once with a lot of stories (that I dearly hope are fictional) about people doing that. Or even worse, intentionally infecting other guys, either by lying about their status or by drugging them.
I've seen plenty of shock sites and got over the initial "ew" pretty quickly, but that put me off my lunch for about a week.