Implying that one illegal example in San Francisco by local police, means that it is a common procedure in the US that is being applied "within our own borders,

Implying that one illegal example in San Francisco by local police, means that it is a common procedure in the US that is being applied "within our own borders," is absurd. A given unit of police can do any given illegal thing, that doesn't make it common or mean that it's going to become common.