I am not saying not to wear a helmet, but we all rode without helmets for years. Racers, commuters, Sunday pedalers, all have pedaled every darned where without helmets.
Many areas its law now, and thats ok.
And there has been some tragic bicycle accidents I don't doubt, where helmets could have made a difference.
So now everyone is paranoid about falling on their heads. A hairnet has a bit of padding should you hit where the hairnet is lol.
Got a hairnet? Have some fun one Sunday and go ride retro. Add some wool.
Just don't wear your lime green while you're doing it, or you may be confused for a cross dresser.