They probably should and will barracde off certain areas and do backpack checks. Every time you enter a mall or pretty much anywhere in the Philippines you have to go through a line and have your bag checked. The checks they do are pretty much a joke, but I think it at least deters people from carrying bombs etc
Also, youll pretty much never find a big trashcan anywhere any place in those countries. Because people drop bombs in them. Doing away with trash cans, and just having people walking around collecting the trash is a good replacement. Also could create some extra work for people