You guys have me pretty much convinced. I do know that 100 pounds dropped on a kid or adult could "kill" someone. Does this mean that I shouldn't use the upper hatch at all? Because I am sure that it weighs at least 100 lbs. There are mini van hatches and SUV hatches out there that are far heavier than the FJ80's hatch as well. The reason I will not go this route is because it would basically take an engineer to do it right. I am not an engineer. So I won't do it.
I do like how some of y'all are thinking of other ideas that are not a "bolt on" product where all it takes is a huge bank account to outfit your vehicle. Yeah some ideas can be dangerous and stupid (like this one) but I would just like to see some more original stuff on this board! Lets stop the attitude of... if you can't buy it from Slee or MAF it can't be done!
That's a completely unfair characterization. You proposed a modification that was objectively stupid and dangerous. You were warned off. A simple "thank you" will suffice.