Do you think part of the solution is to ban back packs?

When I was growing up and all through High School and even college I didn’t have a back pack. No one did. It’s convenient, sure, but maybe we should do away with that convenience now. That way, if someone walked in with a back pack they’d stick out like a sore thumb.
The only other answer would be to frisk and search Every. Individual. Student. Every time they come through the doors.