Despite my busy schedule naks

i've been reading about modern combat and warfare
Isa sa effective na ginawa nila sa Iraq to catch insurgents and disrupting supplies were mobile checkpoints
Mobile as in palipat lipat , random place and random schedule in a single night
It keeps the bad guys guessing and nervous, and it needs minimum personnel kung malaki ang lugar/city/town/barangay na babantayan
Di ba pwede gawin yan ng PNP dito?
Considering that they say bumababa ang crime rate during elections when madami checkpoints