Intruder!!!

Is anyone else as amused as I am by the fact that I have had to resort to putting an intruder alarm (courtesy of my sister) in the kitchen as a means of deterring my 7yo from sneaking in to things in the early hours of the morning? For the past 2wks I have been wondering why it has been so hard to get her to sleep at night....She finally fessed up a few days ago that she was sneaking into Coke in the mornings before I woke up! No wonder she has had trouble falling asleep, she's been buzzing on caffine! Prior to her confession, I had been trying everything to get her to go to sleep at nights and was ready to throw in the towel and book myself in to the nearest mental health facility! So, upon mentioning this to my sister yesterday, she suggested I take her intruder alarm that she bought for her husbands Ute (which he decided against using), and put it in the kitchen. So hopefully it will work and will stop her from sneaking into what we tell her are non-breakfast foods such as coke and her other favourite - icecream. The only downfall is 1. it will probably result in the neighbours either complaining or calling the police for fear that we are actually being intruded upon, or 2. it will make more work for me in having to clean up extra messes in the kitchen as I fear this alarm will cause her to literally crap herself when it goes off! I have set it up on the bench tonight so tomorrow morning will be the first test! If the alarm goes off (and probably makes us all crap ourselves) then I will know that my stealthy little coke fiend has tried to sneak into the kitchen....Or I just had a thought then, it could also possibly be set off by the cat walking into the kitchen, in which case, I better make sure my pet insurance is up to date because it will probably cause her to have a heart attack! Or second to that, will make two messes I will have to clean up as upon hearing the alarm, the cat might crap herself as well! 
Oh its a crappy world sometimes!