Blueberry,

People did that in my old neighborhood in Columbia because there are a lot of doctoral students who move in/out at odd times and you can find some nice things. I was disturbed when one of the people who came around blocked my parking lot entrance for 15 minutes. I took my sweet time getting in the car, honked, and then got out to explain to him that I was going to be late for work. He grudgingly moved. It was really inconsiderate.

I ride this route probably 20+ times a year for a light ride. Whenever I am home for a week or even a few days, I do it once. I've never really had an issue with cars like this before. Maybe the nice weather after days of intolerable heat just had people going crazy, but the female cyclist I met up with seemed to think it was definitely more common when their were tons of garage sales. Perhaps spurious correlation?