We have to be aware of the world we live in.
I believe that mamosh as an issue of mesirus nefesh a plan should be instituted that every Cheder, yeshiva, Beis Yaakov etc. teach children basic street safety. Not to talk to strangers, what to do if you are lost etc etc. I remember as a child (different time different country) that once or twice a year we would be spoken to by a community police officer and our teacher about these things and once a year we were taken on a walk in the street and shown how to cross a street etc, told NEVER to take a ride from a stranger etc. This is all common sense but somehow we have forgotten it.
Cell phones, and technology have their place, but there are those who will take issue with them. Rather than fighting over this we should do what is possible. What the politicians are suggesting is good as well, but things that start from within a community (the bottom) usually succeed faster.
I think that today especially this is an essential part of chinuch. A child will certainly listen to what his/her Rebbe or Morah will say, and it will also help teach a familiarity and respect of the police.
This would take up maybe one and a half hours each school year from say pre 1A until 4 or 5 grade.
It is always easier to find an argument to do nothing, But Maaser Hu Ha Ickuar (Action is the most important thing).