I agree. I was forced to hitch-hike in Guatemala after missing the last bus . I also was picked up by a family and sat in the back of their truck for about 100km. When I got off at 9pm they advised to only continue to hitch on mining trucks or oil tankers during the night. I still remember sitting under a huge banana leaf during torrential rain waiting for hours for a truck to stop. The driver later dropped me off in the middle of no where and said a bus would stop there by 5.30am and indeed it did stop, but it was full so I was sitting on the roof of the bus for the next three hours together with 10 other souls.