whats with our lock down system?

Okay everybody knows that we have a lock down system and Its supposed to protect us against everybody that might come into our school and try and shoot us up. Well Does it protect us against people that go to this school and might want to try it? No it doesn't. It doesn't protect us agianst kids in this school who have problems. Thats the thing. Everybody that goes to this school knows that we have this lock down system and they know how it works. THey know that we would have to shut the lights off and get up agianst the back of the classroom. SO kids that go to this school are not stupid and they would know that we would be doing that and if they had a gun they could just shoot the lock of the door or shoot the windows. kids are not stupid and they know how everything works. You know where they get this stuff from? Tv. Where else would they learn it? kids see a man on tv shoot up a building they start to use those techniques that the gunman on tv used. I think that the school should no longer use this lockdown system. I think that the staff and principals should only be the ones to come up with something and the students should not know what it is. WHo agrees with me?