Heckling the marketing picketers.
I don't know how common this is in other towns, but here in Spokane there is a new fad where a car dealer or a furniture store hires 15 or 20 people to stand on all of the major intersections within a few miles of their place waving signs inviting people to their sales.
It must work, because they are almost always out, especially on weekends.
Today, I noticed that the signs that the local car dealer had manufactured had a defect in them. The spelled the name of the street, "Sprauge" instead of "Sprague".
As I was driving home from church, I noticed this, and decided to bring it to their attention. Coincidence would have it that I had all green lights on my way home, so as I sped past one of them I yelled "You spelled Sprague wrong!" My kids laughed really hard.
I was very surprised that on my next trip out, I passed that same guy, and he had taken a sharpie, and corrected his sign.