Call every day at 8:30 pm, and mid afternoon on weekends. Never leave a message.

Got a phone call soliciting funds for a political candidate.  That isn't what set me off.  When I informed the caller that I do not respond to telephone solicitations but would be glad to respond to a request received by me via USPS, he became both insistent and rude.  That kind of attitude will cost the candidate money, rather than big a campaign contribution chest.
I am furious.