Disney demanding people leave strollers at home b/c someone might hide a bomb in there would go over just as easily as Disney saying you can't bring in
ECV's into the parks. Heck I'd be more worries about those b/c at least there you have moralized parts, electricity and other devises to make a deadly weapon verses a few tent poles on wheels.
NOTHING will be 100% safe. NOTHING. You can regulate the heck out of what a guest brings in or not into a theme ark and some nut job who wants to do damage can still smuggle something in through the back door if they want to bad enough.
Suggesting guests stop bringing in strollers or 'guarding them' is nothing more then stripping away liberties and convinces of innocent people.