I agonized for a long time about writing this. Just thinking about the subject has caused me to lose a lot of sleep. Perhaps it will provide some catharsis.
I also find it hard to give up in my pursuit of a solution to a problem, but the issues of sexual predators and mass killers are perplexing.
How do you deal with the behavior of Bill Cosby and Harvey Weinstein? How do you prevent the mass killings Las Vegas, Orlando, San Bernardino, and elsewhere? How do you stop a slasher on the street?
Weapons are not the only issue. People are thrown down stairs, run down by cars, and pushed in front of trains.
Hypothetically, a vaccine to prevent aberrant behavior could be the solution. More laws are not, because laws can and will be violated. Moreover, laws cannot undo the harm of a criminal act.
Sadly, I cannot help but conclude that there is no solution!