Curious as to who all doesn't mind people riding in the back of your truck. I don't mind it. In New Mexico it's legal if you're over 18 and all of my friends are adults. If they want to...go ahead. Usually only do it to pile a lot of people into one vehicle. Usually for football games or when we're drunk and want to go to Village Inn. The most I've fit in my truck was 12 (5 inside/7 in the back) as we were partying once and wanted to go on an adventure and only had one sober person (a close, trusted friend as I don't just let anyone drive my truck). Also pile people into my roommate's Tacoma from time to time, but my bed's a lot bigger if there's a lot of us. Figure it's a lot safer with a sober person driving one vehicle than the alternative.