So I looked at the suburban picture again, appears to only be 4 or possibly 5 pallets on it. Not sure where people are getting 7.
Its definitely tongue heavy, and appears to not have safety chains hooked up. Everything else I've heard is conjecture based on a slightly blurry photo from a distance.
Now if the trailer and truck had farm use tags, a SMV sign and didnt travel over a certain speed (usually 25mph) it would be legal to operate in many rural areas on non-highways.
Is this an optimal load/setup? Nope.
Is it illegal and bound to kill someone? Don't know, not enough info provided to say.