As far as dangerous, I guess that is all relative.
Just like tree climbing, it is relative to decision making, each participant's mileage will vary.
For most Americans, yes, it is dangerous. But nowadays, go to a party and just saying you flew in a 4 seater cessna is enough to generate gasps. Someone will ask "with a propeller?" and when you say "yes," they look at you as if you just blurted out that you are a woman trapped in a man's body. Say "hang gliding" and people's faces start to crinkle.
There used to be a time in America when aviation was an acceptable activity. Not anymore.
There are lots of guys flying HG's that have been flying them for 30+ yrs. Fatalities now are around 1-2 per year. Compare that to 1978 when 59 people died in the US flying hang gliders. Equipment is safer but it also helps there are training programs and established sites now.