Am I crazy and/or the only one that doesn't use them? Well I take that back I do use one, but it is rare. I will put one up at night if we've been lazy and the house is a cluttered. But other than that I don't use one at all, and for the 3 months I've had Tiggy we've had no problems at night. Tig stays in the bedroom with us in bed (to the best of my knowledge). Other than that I don't have baby gates set up anywhere.
I know some use them to separate packs or keep cats safe and that I can understand. I only have one basenji and a cat that stands up for herself and she has two cat trees that are both 4ft tall, so if she is tired of him she hops up into it.