From the abstract I gathered that average looking people are generally considered law-abiding whereas people with outlier features are more likely to fall into the criminal category: "The variation among criminal faces is significantly greater than that of the non-criminal faces."
Likening this to the "wage gap" where the XY chromosome is responsible for more outlier behavior: both the top of society and the bottom is both heavily dominated by male participants, whereas the female population is closer to the average and has far fewer outliers. Could this be related?
There's variance in XY chromosomes that cause men to swing wildly on the scale in both positive and negative directions. There seems to be an answer to the hypothesis that asserts that individuals with wildly differing attributes seem more often than not to fall on the outside of the law.
It's interesting about the familial relationships. My father is pretty far along the religious spectrum and I am not, however we get along just fine. Of course the alcohol is something of a taboo and there have been certain frictions in between my life choices and his (such as the drinking and piercings/tattoos) however overall the relationship is still what I'd consider stable.
I realize I might have taken this a bit too personally and lost track of the overall theme. I do agree that judging the effect of certain vices could also be judged by more than just "does it affect your livelihood".
LOL it's nice that you think I have relationships. I hope that answers your question.
E: to amend that, I do have a small group of close male friends but I do have trouble finding an intimate relationship, due to other (unrelated? maybe?) issues with women.
I'm a person currently struggling to find that line as well, and what I'm currently using as a barometer is: does it affect your livelihood?
I would say that my love of alcohol and wine in particular would qualify as an addiction; but at the same time I'm able to hold down a job. My bosses are happy with my work and I do feel fulfilled with what I've accomplished at the end of the workday.
I'm sure psychologists would have a field day with me but as far as your original question I've offered my input.