I'm complete novice to paramotoring - so don't take the following as well informed. But as a former safety officer in the USAF who's spent much of my life on flightlines, , I'm a bit surprised at the state of the paramotor design. It feels like where automotive safety was in 1903.
There are a few paramotor designs that treat the netting more seriously. The Skytap Angel for instance; it's netted like a tennis racket and claims to be as strong. I'm not endorsing the product as I've never seen one, and have asked the designer several times about its weight with no response. But I do think that there is an engineering trade worth considering- safety vs weight and convenience and cost. At the very least, the netting on motors could be sheathed dyneema (like the wing lines) instead of easily damaged and highly stretchable nylon.
Jeff Goin has a good section on footflyer.com on building a safer paramotor. I particularly like this:
Cage Hand Test
A critical test for paramotor prop safety is whether it can withstand the hand test. You should be able to put your hand anywhere on the cage and, at the motor’s full rated thrust, NOT be able to touch the prop. It’s a simple test: push on the weakest part of the cage netting nearest the prop (usually its tips) and see if you can touch the blade. If you can, you’re at higher risk of a prop strike. There should also not be any large holes that would easily allow a stray hand to go through.
From what I can tell, there's a weird history about stronger netting, and it's related to the infamous Flat Top by U-Turn. The Flat Top suffers from a spokesman who makes terribly inaccurate, irresponsible, and offensive claims about its safety while denigrating everyone else. He's aliened nearly the entire community with his arrogance and grandstanding. But we may be throwing out the baby with the bathwater. The motor does have some interesting ideas in it, one of which is a net that you can stand on without deflecting into the blade. The Skytap Angel does that. I think that if the Flat Top weren't associated with such an a**hole, a few more manufacturers might pick up the idea and make incremental improvements.
An aside: I'm also looking forward to when hip belts (like on rucksacks and xc backpacks) on paramotor harnesses are standard. Scout just put one out, but it's not for novices. This a safety issue, not just comfort. The longer you can stand there in the ready position, waiting patently for a favorable cycle, the less likely you are to make a poor go/no go decision because you're hot, tired, shoulders are aching, and you've blown three launches already. The times I've come closest to catastrophe with chainsaws, table saws, electricity, and romantic relationships all have one thing in common - exhaustion had snuck up on me.