To me the usual is to avoid delays along routes and packed venues where you can't get service except in long lines.
Depending on country, yes, it could be a safety issue as terrorists target packed areas.
However, I prefer the Israel view and do not live my life in fear.
I've heard of an app in development which enables one to avoid densely populated areas (rush hour places for example) and find areas where there a few / no people.
Am I wrong to think this might be a safety issue?
Thanks for your feedback.