I agree: the letter is too wordy and antagonistic.
Keep it brief and to the point. Let the city drop the case if they want to, but inform every household that they have the RIGHT to prevent future visits to their private home.
I got a packet from CCI within the last couple of years, but never sent it out b/c it was so wordy and 'over the top.'
"Kein Mensch muss mussen."