Knock and announce

I'm a law and order kinda guy. But John Law does need to know that we're citizens not subjects and there are boundries that shall not be crossed.

Knock and announce or risk being gunned down by an irate citizen sounds entirely appropriate to me. Nick Szabo frames that much better than I do, and has the background for Semayne's Case, where the phrase "a man's home is his castle" comes from.

Semayane's Case  online here.