We actually had a similar problem back in the early 70's where I was teaching in Jr. High. Kids would sneak a couple puffs on a cigarette in the restroom, boys and girls alike. Finally, the girls gym teacher called a few girls together that were known offenders and had one of the custodians demonstrate the new "invisible smoke detector." Since he was a smoker it worked out fine. We took all the gals into the restroom, he lit a cigarette and took a few puffs on it, blowing the smoke out toward the ceiling. All the time he's talking out loud, as is the teacher, giving a rundown on what's going on. A few seconds later the bitch box came alive and in the background you could hear a bell going off. It was the ass't. principal calling to let us know that smoke had been detected in that particular restroom but none in any of the other rooms in the school. It was all a ruse, but the girls didn't know that. So ended smoking in the restrooms throughout the bldg. They never caught on to the fact the bitch box "send" button had been taped down so the principal could hear all the conversation, allowing him to make his call back at the right time. Some boxes are set up so you can't talk and hear at the same time, these were configured a bit different. You could actually carry on a two way conversation by holding the send button down.
The only problem it didn't stop was the clandestine meetings during class of two kids in one of the restrooms, meetings that involved the study of human anatomy....to put it in kinder terms. I caught one couple in a boys restroom and had the feeling I was just in time. With the promise of better classwork from both since they were in one of my classes, I kept it under my hat for the duration of the semester. They were both excellent students so when they kept their side of the bargain, I forgot about it. Twenty years later, that young girl was hired as a supervisor in the dept. I worked for as a State employee. When I stepped into her office that first day, you could have knocked her over with a feather. So when I asked her jokingly if I needed to watch her re. the men's restroom, she laughed and showed me a picture of her and her hubby.....the same guy I caught her with over 20 yrs. earlier....and one beautiful daughter that was attending U.C.F. Life had come full circle it would seem.
