Probably more to do with the increasing amount of near misses reported by commercial aircraft pilots.
Please elaborate.
The most recent one was a plastic bag from what I remember
Yes, because you want the motors to turn opposite to their thread rotation so the nuts self tighten against the force of rotation. You will need to solder one up to test the rotation on uncrossed motors.
It's a really fun thought experiment trying to work it out in yer head btw.
If you have ESC's with blheli it doesn't matter as you can change to motor rotation in blheli suite.
If you don't have ESC's with blheli, you should probably look at flashing them, if possible. It will help massively.
I think it's all pointless to be honest. I've never lost a nut off a normal motor, and I've been flying for several years now. Nylocs don't tend to come unthreaded, that's the whole point of them.
So much this. Although from recollection I believe you have blheli on the escs I believe?