It doesn't matter where it's happening.
Try to see it from my perspective: I'm a homeschool parent, so I already view "public school" as unnecessary. Yet, I'm paying thousands of dollars every year in school taxes alone, just for other children in our town to attend public school.
I live in the suburbs, too. In our small town, high school students were caught making bomb threats, and every now and then, the middle school is put on "lockdown" so the police can search for drugs.
So, from my perspective, the schools are already run like prisons. In fact, the schools here are so much like prisons that, once in awhile, when my children are misbehaving, I threaten to send them there. ;-)
Now, consider all the horrible tragedies taking place. Schools are big targets filled with vulnerable young children. If things have gotten so bad that teachers have to be armed to protect the students, those places need to be shut down.
Close every single public school in the country, and I'll be happy. :-)
Imagine the violence that would be wrought on helpless kids by parents already psychologically stresed to the breaking point by their jobs and life in general! Most parents see school as daycare anyway. Now remove that barrier of relief from kids who drive them nuts in the first place. It would be infanticide on a massive scale.