This happens all over America at literally any event of significant size.
Go show me anywhere above a local high school game where 100% of people are happy with how security enforces their seemingly arbitrary mandates.
I don't want to judge people who I've never met, and I understand that every person has their own particular needs and idiosyncracies (sp), but a fundamental tenet of attending any type of event in the current hyper-security climate of this country is to pack as light as is conceivably possibly. I never take anything into a game beyond a roster sheet and maybe a poncho or sweatshirt if the weather is iffy. And guess what: I've never had an issue with security, anywhere, ever.
I fail to understand the urge to take a "bag" of any type into a sporting event, and yes I understand that women have different needs than men and I'm not trying to offend anyone or come off as a chauvinist here. What is so incredibly important that it can't be crammed into the smallest possible container for 3 hours to avoid any potential hassles like this?