If you can target by age, wealth, region, interests, etc. Can you target by gullibility or vulnerability?
I am sure these companies have figured it out. Maybe mental/disease issues like Down Syndrome, Alcoholism, or gambling addiction. Perhaps age deterioration where general acuity is lessened or dementia. Teens more susceptible to peer pressure.
I am sure there are a lot of other possibilities. Curious if these are actual segments that can be targeted, directly or indirectly?
(no I don't want to target them)