Karl Denninger has a few words about the Texas school shooting, at Market-Ticker:
If you have children then you have voluntarily taken upon yourself the responsibility for the safety of others, specifically, those children. You choose where they go and who they go with. You choose the school. You choose the Principal, the teachers, the staff members and whatever security measures are there.
If you are sending your children to an unsafe place without the presence of armed resistance, whether that constitutes you personally or someone else in your stead you are an unfit parent as you are intentionally and knowingly putting those who you willfully accepted responsibility for in danger.
If your school is full of part-time felons, including bullies who think assault and worse is part and parcel of "going to school" that is in fact worse than a prison yard in that at least in the prison yard the other crooks need to make their shivs out of stolen plastic cutlery.