Give us all your personal information or you are not allowed into Hillary rally ??!?

We were in line at a Hillary rally in Phila on 10/22/16 and were surprised to find out we needed to fill out a form on all kinds of personal information or we were not allowed in. They called it a "ticket". Nate threw his out and in hopes they asked for it, I held onto mine and was going to hand it in with no information on it. I never heard of such nonsense.