The chickens are coming home to roost. The more cops pull shit like this, the more people will distrust them and the politicians who give them their marching orders (i.e., laws). Even white people are beginning to understand what blacks and Latinos have understood for decades: the po-po are NOT your friends. If they come on like they are, say NOTHING. Ask "Am I under arrest? Can I go now?" If they keep asking questions, ask for a lawyer. Repeatedly.
"Once the cops start asking questions, there's no stopping them."--William S Burroughs
"The War on Drugs is a pretext to extend police powers."--WSB
"If you're in trouble, don't call a cop--call a hippie."--Anon. (common Zen savvy from the Sixties)