I used to go out in my TJ whenever we had heavy snow and find people to help - back when no kids, had all that free time.
One time I ran into a guy in a lifted F-250 stuck off the side of the road, just spinning his tires and slowly drifting further off of the road. Stopped and asked if he needed help or a tug out, and he continued spinning the tires. I noticed only the rears were spinning. I asked if he was in 4WD, he said Yes. Then I noticed the hubs were not locked. I told him to hold on, I went around and locked both hubs, told him that they needed to be locked but they weren't, and said he should try again.
He gassed it, immediately pulled out of the ditch, and just sped off down the slick road without so much as a wave or a thumbs up. What an ass, and he had clearly never ever used his 4WD before despite driving a huge bro truck.