I guess I have more of a criminal mind than I thought. When I first read this thread, I thought it was for these types of reasons, but it didn't make sense because I could just tell someone that I'll enter DCA at 10:00 and give them my pass at 10:30 and there won't be an issue, right? Or, am I still not getting it? I see the immediate enter block, but if you can easily enter 30 minutes later, I don't understand how this is helping anything.
P.S. I absolutely would never share my pass. Just thinking about how easy it would be to get around this "security" feature.