As well as not having a function to understand how many people are on every little plane, US ATC generally has no idea where VFR traffic is going unless that traffic asks for Flight Following to that destination. They control their piece of airspace, that's it, and don't over reach. Neither do controlled airports keep written records listing the tail number of the hundreds of planes that showed up unannounced that day. Nor does every airport have a fire crew standing by waiting for the next disaster. It works fine.
I've noticed a lot of pilots text to keep in touch after they land. I'm inclined to text my loved ones to say that they missed a good lunch at a distant airport, and they reply that the dog misses me.
Last edited by Silvaire1; 11th Dec 2015 at 16:13.