I think the paranoia is what I was looking for, so thank you for delivering!
For the most obvious: idk, I think people should generally have a healthy distrust of those in government positions. Maybe ideally not, but in reality, it's necessary to not be taken advantage of by any manner of power hungry people. If tiktok half truths inspire someone to start actually looking at what xyz government has done, then that's a win in my book. If they just eat the half truths as is straight from tiktok, that's when there's a problem, but that's what my "why don't they educate people on how to spot propaganda" is to address.
Less reasonable: I think people should be allowed to do what they want to do long as it doesn't infringe on the health and safety of another. I guess you can split hairs about it decreasing health due to people working out less or something like that, but I don't think that's a good enough reason for government action.
Unreasonable: this actually seems the most reasonable to me, believe it or not. Military people posting the wrong thing at the wrong time from even a personal account can and has had bad effects on security before. That's why I would support a ban of any spyware-like app on government devices and on military bases (this was originally only support for a ban on gov devices, but I think if we're thinking about security, banning it in places where leaks may cost lives makes sense)
As for the endless possibilities of leveraging mental illness knowledge of a user, I'm afraid I can't imagine what one could do. The only time I can imagine that would really matter is if China takes over the US and goes full genocide on the population. I think the world would go down in nuclear flames before that would happen though...