What kind of environment are you talking about? Work? Home?
I can't imagine what it is that can't be verbally stated. It seems like you may have some special circumstances, but other than verbally or discipline, whether in a work OR home environment, I don't know of a way to post this kind of warning on a system.
If you are an employer, then there are special programs to do this type of monitoring- but I don't know of anything that 'tells' them it's being done other than the rules an employer sets up.