Possible, but it could also be that the reviewing system considers them a high-signal user: very few reviews most/all negative would be a person who doesn’t care for reviewing but had such horrendous experience they were pushed to warn others.

I operate like that, but the other way. I generally only leave very positive reviews when I've had a great experience. I guess I'm fortunate that I've yet to have an experience so bad that I was motivated to leave a 1 star review despite my apathy.