I really don't expect to hear it (call sign) on simplex. Lots of kids and those annoying roger beeps, landscape companies, campgrounds, etc. I DO expect to hear it on a repeater. If you purchased a repeater capable radio and learned how and why to apply a repeater tone to access it, then it's reasonable to assume you know you're supposed to have a license, and are willing to part with $35 for a no-test license for 10 years. After all, you are now transmitting a WIDE ranging signal over several dozen to several hundred square miles. Unlike most Amateur repeaters, many GMRS repeater owners require you to obtain permission to use their repeater, with the obvious requirement that you provide your call sign. It's fairly easy to figure out the PL tone and get on the machine without permission, but that operator will likely be shunned, which is the most effective solution to that problem.