Walking past the office, going to the classroom and telling someone to bring the sign-in sheet - is not willingness to sign in.
The “buzzing in” has to happen with everyone - even those who will not be allowed past the office. You’re being buzzed in NOT for free access to the school, but you are being buzzed in to go to the office to “get the clearance” to go past the office.
I’ve seen stupid people interact with the police and they DO get themselves arrested. I’ve been around many such instances when another person would have walked away from a police encounter - and a “real stupid person” gets arrested. Usually I’m saying to myself ... “He’s going to get arrested!” And he does ... :-) ...
And no ... they don’t know too much, because certain types of people are mouthy and draw a lot of attention to themselves - and quickly get to be known by others around them.
No, whether a person is acting wisely or foolishly, in all cases, the police *choose to make an arrest*. Sometimes they choose wisely, and sometimes they choose foolishly.
And a parent in a free nation does not need to “get clearance” to attend their own child-—unless you believe that the child is the *property of the school* and that the parent requires *permission* to manage their own child’s affairs on school grounds.
Now, you could argue that this account demonstrates that we are not a free nation, but in that case, one would hope you wouldn’t defend the practice.