Be thankful that we have the right not to answer questions, and, yes, be thankful that crazy guys like this are out there demonstrating that right. But then remember the social contract and your obligations as a citizen; if the police are asking a reasonable question, you should answer.
I guess they only want to intimidate you and get you talking for a quick psychological profiling. And the OP responds like I wish everyone with nothing to hide did.
And that doesn't mean entrance lines would take forever. Police adapt their routines to the available time and resources.