at my church we ave a nursury system where the child is given a number and the parent is given that number. it is like 101, 030, etc just a 3 digit number and we have a powerpoint slide that we have at church that is a black screen and in yellow, it saud Nursury # 101, and it alerts the parents to leave service and tend to their child. in thinking it becomes distracting when worship is going on and when pastor is preaching, and you have to cut the show, go to black and display the slide then go back to the songs or the sermon outline, (Which i use Zionworx to deliver in a fake song called sermon) a neat feature would be a nursury alert feature where a small black or red box pears in the lower left or right corner, and you just add the number you need, like 101 etc. ad you hit a button like go live or something and it discretly apears in the corner for like 10 -15 seconds and is less distracting, just a thought. 
P.S. it may be cool to also be able to change the options like from nursury to like car with lights on and insert the liscence number or something cause that became a distract too, maybe if it was all one feature where you can type the title you want like nursury or car with lights on etc, and them the number
I agree this is an excellent idea although sadly our congregation is small enough not to need it.
