If proper precautions are taken(as mentioned by bayboos), and users are trained properly before takeoff I don't see the immidiate danger....? Would make for a quite effective lowcost first training platform for gyrocopters. Make the mentioned 2 seater version to carry an instructor and pupil for the first flights, then go solo on a single seater version(or the same one), and only
then move on to the "real thing". You can even train rotor preflight checks etc. with these, building up training complexity in small steps. And it would reduce wear and tear on the expensive licensed aircraft a lot, probably cutting flight school cost substantially.
As a tourist attraction for practically or literally untrained "pilots" flying solo on first try.....yes, thats definitely positively, inarguably and undisputably nuts!
The fact that anyone in the US apparently may build an actual ultralight gyrocopter(or plane) and fly it without any kind of licence, documented training or airworthyness certificate, is far more scary in my opinion.........
...Which reminds me of this little clip: