Police militarization is a symptom of a larger problem. The police are simply equipping themselves heavily to make the job they're tasked with as easy as possible. The real problem is the proliferation of freedom crushing laws and expansive police budgets that the modern busybody American people (tacitly) and their elected representatives (directly) have approved. Without those laws and funding, and the busybody [bleep] voters who enable them, we wouldn't have MRAPs on street corners.
My wish is that everyone who says "there oughta be a law" would choke themselves.