I fly a paramotor. For me, it's reckless behavior. Other pilots doing dumb shit like flying over hazards with no "outs". That just means flying in a way where if your motor were to die, you'd be forced to land in a bad place. Causing you to injure yourself or others, and also potentially damage property. Also pilots who are a nuisance and piss off the public. It makes us all look bad.
A common saying in the sport is DBAD, didyn't be a dick. But some don't abide, and be a dick.
Probably self-trained, too. That's not uncommon in paramotor. Paramotor can be an incredibly safe, and cheap way to fly. But without good instruction, there's a lot of ways to get yourself killed. Ending up in a tree is probably one of the better outcomes for that guy.
I'm going with poor decision making all around.
I wouldn't be surprised if they got something built, and scared themselves shitless the first time they got in the air with it and never touched it again.
Every now and then we'll see a complete newbie ask about building their own paramotor to save some money which is insane because a full, brand new beginner kit costs in the neighborhood of $10k-$15k brand new. Used gear can easily be half that.
Building your own gear is insanely dangerous, because if it's configured incorrectly, you can easily end up in a dangerous situation like a torque twist where the motor twists the risers of the paraglider and spins you around underneath it. That situation is often fatal. And newbies just don't know these things.
And the icing on the shit cake is that these types often have a chip on their shoulder. They get indignant that we recommend paying for training and tell newcomers that they don't need to waste the money on training.
I have a radio, I know how to use it. I almost never carry it just because my motor spark causes so much interference that it makes it unusable. I'd like to figure out a way to shield that interference, but I haven't done it, yet. I fly out of a small, not-busy uncontrolled airport, but I'd really rather not be near an airport if I could help it. I'd much rather fly from just a regular grass field if I had access to one.