If one could do that, then we can stop murder, theft, corruption etc etc etc . . . . . Reality and Ideals are different in reality, we have to both teach our children not to do the evil and make examples out of criminals to show them exactly why ... while we ask everyone to be vigilant cos there always will be criminals ..... then only we can achieve the best possible result.
U want to drink? your free, but please dont drink to the excess so that you can not call for help.....
U want to wear skimpy clothes? your free too, but those short clothes allow greater flexibility, so learn to deliver a good kick up the crotch, scream real loud and run real fast...... or carry a taser, knife gun etc
I can guarantee I myself wont try to harm anyone but I can not guarantee for everyone..... so u have to take some precautions to exercise your freedoms then only u will have the greater safety.