I started doing that with the small mom and pop stores whether they have a sign about it or not. But with the big, corporate stores, I have my pouch of coins handy. A couple of clerks have commented, "Good for you! I do the same thing. They're not going to force us into using cards that they can use to track us and then one day disable our cards." These were older teens/younger twenties so there is hope for the future!