To find a solution, we first need to define the problem or problems. I don't suspect that we (the collective we) would ever come to an agreement as to the problem(s) to start.

Next, solutions should be aimed at addressing the problem(s) not the symptoms.

Personally, I think that this problem is one without a solution. As long as evil people are in the world, bad things will continue to happen to good people.

Sure, there may be things that we as a society can do to take the edge off and/or make small differences here and there, but we will never fix this problem. Implementing these control measure while trying to maintain a reasonable standard of "freedom" is the task.

Security and safety are first and foremost personal responsibilities. Take what steps you need to try and protect yourself and your loved ones and don't leave that task or responsibility to anyone else.

"All that is necessary for the triumph of evil is that good men do nothing." Edmund Burke