It's OK to take wealth by force. I for one am unable to see any clear lines. Thus, I propose that force be banned from society altogether. That is, coercive government schools should be replaced by voluntaristic, free market schools. When a business can force its customers to pay for its services no matter what, because that money is taken by force via taxes, the business loses all incentive to take care of its customers.
Education is no different.
When taxes pay the bill, customer service goes out the window and is replaced by saving face and passing the buck. Obviously, most school officials care very much about their students. However, if there is only a slight weakening of the incentive to take care of students, dangerous situations can go unchecked. Government school officials know that hardly any action they take, or fail to take, will interfere with their careers. School shootings could happen in market schools as well as in government schools.