Robot Watchman

After the school massacre at Newtown, a company named Knighthawk was founded. They claim that they want to sell and market a robot watchman that will prevent shootings like this from happening.

The robot is unarmed. So tell me how a burglar alarm system on wheels is going to prevent a shooting when, according to the article, it can't even prevent unruly teenagers from tipping it over. When asked about teens tipping it over, they said that the video recording ability of the robots would deter this. Explain to me how a person engaged in a suicide mission of killing kids would be deterred by the fact that he was being video recorded.