So, I'm wondering if any races ever actually use the little flaps on the bottom of the race numbers where you're supposedly supposed to write your name and stuff, and then tear it off and give it to the peeps as you cross the finish line. Are there really any races nowadays that don't have an electronic registration system, even if it is same-day registration? Does anyone actually use these, or can I tear it off before the race? The main reason I want to know is that I want to tear it off and cut a few milligrams, as many of you know I'm a total weight weenie. But I'm also just curious.