I've seen online ads that mention tardive dyskinesia, which is a drug side effect that is particularly associated with psychiatric drugs such as antipsychotics. Of course, there's no way to tell exactly what algorithm/data this is based on, and whether it's my data or the data of people that I'm connected with. Seems like somewhere there should be a HIPAA violation, but that's pretty hopeless.

I think it's safe to say that anyone who is diagnosed as a paranoid schizophrenic is being targeted, which makes it all the more difficult to suppress feelings of paranoia and distinguish actual tracking from coincidences. I doubt there are any people who are perfectly sane driven mad by advertising, but it's quite plausible that it has a negative effect on people trying to cope at the margins.