Get them deactivated then like we do in this country.
I'm not saying there that people don't also enjoy target shooting with them, which they might or might not - but emphasis being most of these people have no interest in using them to and never will to shoot a person let alone a child.
As per some of my other posts in this thread its possible to enjoy shooting firearms for target, etc. without having them able to use semi or fully automatic fire which begs the question as to why such firing modes are legal (though full auto is generally not). In bolt action, etc. type configuration it makes it very hard to use them to carry out sprees like this.