I feel the same way.
I am not the bravest but if i had to i could try to do what i could to stop it.
I will have no problem sleeping at night after killing someone that needs it.
It's been a while.
I just hope that his actions brings some better reactions to these situations when they come up.
If it were known that armed folks were in the school i believe that these type of events will stop.
The folks that do these things don't/won't like the fact that someone will be shooting back.