A couple of points are in order:
1) TIM, SX and HDK vids, such as the OP said he liked, are virtual exercises in serosorting: the guys are already poz. I am acquainted with several guys who have done work with those companies, and they've all confirmed what I had suspected already. As far as other companies go, like SEVP and some of the "amateur" companies: it's their own business, their own bodies and their own lives. They know the risks and make their decisions accordingly. If and when they seroconvert, they'll shave 25 years off their lives, which is punishment enough, thank you.
Once you have HIV, you are already infected. Reinfection is an urban myth: HIV+ people are the most carefully monitored population in medical history. I get my bloodwork done every 3-4 months, never further out than 6 months. If there were any possibility of reinfection/superinfection, I'd be dead by now, as I haven't used a condom in many years (but I only have sex with fellow HIV+ guys ie: serosorting). The double "B" in my screenname is not an accident.
There are, of course, many other risks to unprotected sex: I am well aware of them and have taken one for the team on multiple occasions. I do not minimize when I assess my own risks, and I've never met another guy in my position who did either. Living with HIV since 1983 has taught me plenty.
2) I am clean. I take a shower every day, sometimes two. Referring to someone who is not infected with HIV as "clean" infers that those who are infected are "dirty". I am not. If you really cared half as much about people living with HIV as you claim, you'd stop using the term. I am not looking to be insulted, as frankly there's nothing anyone could say here that I'd find personally insulting. But as there's a much larger community who reads internet message boards who haven't grown the tough skin I have, and perpetuating the shame of bias and stigma is just plain wrong.
The wonderful thing about a free society is that everyone gets to be as big an asshole as he'd like to be. They just shouldn't cry foul when they get a strong push-back.