Yes, this is a toy, but it’s also can be useful as proximity alarm with active intruder warning system. “Active” here meaning it doesn’t just scare intruder away with sound or light but also discourage the intruder with a physical contact, by launching a pair of ICBM (Inter Cubicle Ballistic Missile.) No worries, it contains no radioactive material, in fact the missile is created from soft harmless materials. Just enough to let the intruder know that he/she is tripping a restricted area, a.k.a. your cubicle.
ThinkGeek comes again with a nice little gadget; the Shooting Cubicle Alarm System is three-stage system to help protect everything in your cubicle - and beyond. The first line of defense (a.k.a. Alarm No. 1) when tripped, will flash and klaxon to warn the intruder with sound. It also simultaneously arms Alarms 2 and 3 (using invisible wireless signals). When Alarm No, 2 is tripped, it will spot the trespasser with red light beam along with even louder alarm. So it’s use sound and targeted light as warning. If the stubborn intruder still insist to enter and thus tripping the Alarm No. 3, then Alarm No. 3 will launch two foam missiles at the intruder. A physical warning. Cool, isn’t it? I just hope for an additional 4th layer, something like electrocution may be perfect in this situation 
Watch it in action! 