As i tore it up--unread--i pondered how much she spends on postage stamps.
In the U.S. we can write on the outside of a piece of mail received something like "Wrong Address - Return to Sender" and the US Postal Service delivers it back to the return address. I know they are using their local Kingdom Hall for the return address, but I still think it is a great opportunity.
On the front of the letter write "Wrong Address - Return to Sender".
On the back of the envelop you have a whole blank space to write whatever you want. For example -
"Google: Australian Royal Commission and Jehovah's Witnesses"
"This household does not accept mail from groups that protect child sexual abusers"
"108 years since 1914 and still no Armageddon"
"Can you explain an Overlapping Generation?"
"J F Rutherford told me religion is a snare and a racket"
"If the end is so close, why did you stop going to meetings for 2 years?"
"How many non-participating observers were with Jesus when he passed the wine & bread?"