Are those examples at all indicative of what conspiracy theories are anymore, they seem stuck in the last century? The only one of those I've literally ever seen, even online, is aliens (and just UFO videos). On the other hand I personally know a lot of people who consistently buy into medical and political misinformation (and social media pushes it to me at least weekly, no matter how much I try to say I'm not interested).

I know a lot of people who have had to cut off family members because they got too deep into conspiracy theories and it's pretty much always weird political ones.