This may vary from State-to-State but I haven't found anything on it legally saying we can do it. Texas says: "No Texas law forbids adults from riding in the back of a pickup truck. While it’s not uncommon to see farmers and ranchers in rural areas of Texas moving their workers from place to place in the back of a pickup truck, it’s definitely not a safe choice for most motor vehicle passengers. For those under the age of 18, it is generally not legal to ride in the back of a pickup truck with a few exceptions. In Texas, it is a misdemeanor traffic violation for a person to operate an open-bed pickup truck or an open flatbed truck with a child under the age of 18 years old riding in the bed of the truck or trailer. If prosecuted, you could be facing a fine of between $25 and $200." That being said, is it legal or not legal to install rear facing bench/bucket seats in the back of the bed against the window with seat belts to allow people to ride in the back without police interference? Couple of optional and expected answers: 1: Don't live in Texas 2: Do it anyways and fuq the pigs 3: Great Question..(Following) 4: Not Legal (for these reasons) 5: Yes, but only if/with......... 6: Why the fuq would you even consider this? 7: Get a QuadCab Dont limit yourselves to only these options.. be creative and as supportive as possible. We're all here for a good time.