Might be OK if you had the power to pull them. But I imagine would be a bear to back up. In my state, you have to have a doubles endorsement on your CDL to pull these.
I've seen Canadian pickups pulling a camper and then a boat behind the camper. Totally illegal in NY, I don't know if or how they make it through without a ticket.
I meant just one trailer, not a double setup. Sorry I didn't explain very well. Obviously the trailer would have to be sized for the towing vehicle and not made of legos. I've never seen one being pulled by a car or pickup, I just wonder if it's illegal or something. Seems like you wouldn't have to worry so much about weight distribution and such.
"Why can't we pull trailers that have two axles - one fixed and one turning - and no/insignificant tongue weight?
One response above alluded to the likely fact that they're really tough to back up (I've never tried, but I can imagine that since the coupling between tractor and trailer is flexible and is attached to a turning axle, it's downright difficult). I'm sure there are other reasons, but I can't quantity them and will leave it to others to answer this better.