They can't tell you your eye color from their DNA data with any degree of confidence, and you seriously expect them to be able to find a marker of something as vague as "troublemakers" ?!
That's about blue/brown, and realistically, there are a bunch of other genes which also have effects, as "eye color" is really a collection of phenotypes, not just a single one.
https://en.m.wikipedia.org/wiki/Phrenology
Never underestimate the willingness to engage in the days new "not-yet-clearly-identified-as-quackery-pseudo science" when there is a buck to be made.