Re: wouldnt it make sense to make AIDS testing mandatory and tatoo people infect
What a terrible idea! You do realize that people bleed when they get tattoos, right? Most every tattoo shop has a policy to not tattoo anyone HIV positive, because of the risk of contaminating the entire shop. So even if you forced shops to give these tattoos, your idea would put more people at risk of getting HIV/AIDs than if you did nothing at all.
We're not going to beat HIV/AIDs by forcibly tattooing those who have it. If bad people with HIV want sex without telling a partner, they can still do it. Makeup can cover a tattoo, they can still hide it, rape, etc. There is no easy "anti-PC" solution to HIV/AIDs. We beat AIDs in the long run by increasing government funding to medical research, education, and promoting the use of contraceptives (especially in Africa, where religious authorities still are trying to get people to not use contraceptives, and are quite successful at it).
Poverty and desperation are a big part of the picture too. When you're poor and desperate, your decisions are generally much more short-sighted and irrational. So improving global living conditions is very important for controlling and reducing illnesses like HIV as well.
And as for moral grounds of dispute: doing this would merely demonize the good people with HIV/AIDs, while the bad people who know they have it but are hiding it from partners will still be able to hide it and do whatever they want. So you'd basically be punishing good people with a painful, expensive (would you be putting tax money towards this "plan", lol), embarrassing tattoo, while failing to solve any problems. You're also going to be giving the gullible supporters of this cause reason to think that the issue is simply a matter of correct tattooing, and lend to the narrative that "them damned libruls" (or whatever term you want to use for "the enemy") who want education and medical research spending are fools, and that all we needed to do was tattoo the vulnerable rapey sick people! And if your idea was blocked by a more reasonable branch of government, you could go around crying about how you had a perfect idea, and the "PC librul shadow government elites" selfishly blocked you, and so you should pretty please be given the power of a "grand supreme leader king" now. It's pathetic. This is a classic example of an "idea" that would be used to obfuscate problems (most likely as a shallow form of self-aggrandizement), not solve them.
What we are more likely to see in the future are things like RFID chips implanted in people. This isn't really a major problem in and of itself -- more concerning is how this ties in to the control of information and the willful gullibility of people to authoritarian power through conditioning, falsely bifurcated agenda setting, and good old fashioned hierarchical ass-to-mouth human centipedeing; people kissing each others' asses in the hopes of elevating their sad, pathetic lives -- everyone else be damned.