Why wouldn't you want to have a safer environment? We don't know what may have been picked up in the intel chatter. BTW, the mere presence of detectors can be a deterrent as softer targets are preferred by the bad guys. A sign in front of your house saying Warning: Vicious Dog Protecting Premises--can help prevent intrusion. (Maybe we should display that one also at the Rent--lol.) Seriously, you can't be too careful in this world. And if there was an incident don't think there wouldn't be questions as to how prepared the stadium authority folks had been.