Stay out of my conference rooms

I remember long-ago debates with my friends about whether or not it was appropriate for children to play with toy guns.  Those were simpler times.  Now parents get to decide whether it's appropriate for children to play with toy automated fixed perimeter defense rapid fire cannons. 

Either way, I have just located the next office gadget.  After all, we did name our conference rooms after historically significant fortifications.   

Field test report to follow.