I CAN Imagine a flying place without ama control- well, its more of a reality than imagination: I was in a group of StreetFlyers & that is just what you said, nonAMA ruled or insured. .. no tech checks, no impound/pins, no freq board.... no waiting to fly, no fees, no hassles. Sure the cops sometimes would tell us they were going to use the street and we had to wait 45mins till the cops said it was ok for us to fly... but cops need streets too, and streetflyers are a sharing bunch.
Maybe in Texas, but what about everywhere else? Remember there are 49 other states in the US that are much more condensed in population then Texas. Most my neighbors can't walk out back and see 300 miles of clear land.
How many millions insurance do you need for 103 ultralights in classG or 700'E space where any unlicensed fool can get up? The feds are hands off management regarding ultralights. Everyone should spend a whole 10mins and read part103 of the fed laws in entirity- all 6 or 8 pages.
WOW 6-8 pages and the AMA rules are what like 1/2 of 1 page? Also there are lots of restrictions for ultra lights that are not only found in part 103, there are still many general aviation restrictions in the rest of the FAR. The FAR does not state "do whatever you want in class G&E UL pilots, it's all yours to screw up". I mean the most obvious rule to 103 states: No person may operate any ultralight vehicle in a manner that creates a hazard to other persons or property. That's a pretty generalized rule which can mean A LOT of things.
Don't forget when you hop into an ultra light you are putting your own life in your hand and potentially others on the ground so typically not too many people are going to just be able to jump in and fly or else they may just barely clear the runway without splatting their plane into the ground. You're typical UL pilot has more knowledge in aviation then some 15 year old kid that got his flight training by a guy behind a counter at his local hobby shop.
I would like to see this "utopian" uncotrolled uninsured RC field where some young stud walks up with a never flown $3k whirlybird with CF blades and plows his heli into a crowd because you think the AMA is too controlling. That would sure be an interesting field. Why do you think that public parks need insurance and want to work with companies like the AMA?? Because they not only insure, they set guidelines and they've been doing it for many years.