clicker,
It's never a good idea to start a fight you can't win (or to "buck the system" - for the system will always "buck" you !)
In any encounter with the Guardians of the Peace, adopt an attitude of humble cringing penitence: "Yes, Sergeant" (to a Constable) or "Yes, Inspector" (if a Sergeant), etc. Goes down well. "A ticket for the Police Ball ? - Certainly, Officer - I'll take two !"
Belligerence is not a good idea (particularly in foreign parts). A neighbour in the Volkspark had a German girl in as a baby-sitter one night. The boy friend turned up at the door, somewhat miffed as (he maintained) other arrangements had been made for that evening. The altercation became extremely heated; the Polizei were called.
They arrived with commendable speed. "Now, quieten down and go home, sonny", they said. But Sonny was having none of it. Without further ado, a Polizeist whacked him over the head with his nightstick, threw the recumbent form into the back of the Combi, and off he went for a night in the cells.
Peace reigned once more...D.