Today I'd gotten to a bus stop, with a bus only a few minutes away, as had a mother and daughter, when a canvasser showed up. He initially spoke to the mother, and the bus had reached the stop by the time they'd finished talking, and I avoided talking to him.
I avoided because I overheard and realized He's probably canvassing on the same issue I'd signed last week, but how would it sound if I'd said "I generally don't sign petitions, and I think I signed this"? It'd sound like I was lying, and like I was covering my bases. "I don't do this, and I've already done this."
I probably will keep not signing petitions.