I'm not sure what other cities protocols are for security but I live in texas and not to long ago my children's school went on lock down instantly when some was spotted on the premises that did not need to be there. It was turned out to be nothing but they took no chance. They have very specific procedures for parents and visitors. Door is always locked. To get in you ring the doorbell and the front office will let you in or speak to you through the intercoms. Once in you go through the office where you hand them you liscense and you are printed a vistor badge. I don't know of any schools that keep the doors unlocked to outsiders.
I'm not sure what other cities protocols are for security but I live in texas and not to long ago my children's school went on lock down instantly when some was spotted on the premises that did not need to be there. It was turned out to be nothing but they took no chance. They have very specific procedures for parents and visitors. Door is always locked. To get in you ring the doorbell and the front office will let you in or speak to you through the intercoms. Once in you go through the office where you hand them you liscense and you are printed a vistor badge. I don't know of any schools that keep the doors unlocked to outsiders.
And it just happens to be the door he goes in is unlocked. Stinks so bad