You can't have SAR making people wait for daylight to rescue, or wait even an hour. Whether the danger is real or perceived to the victim or their family, waiting will in most cases be far more expensive. it costs the same amount to copter someone off a mountain alive or dead, but dead people don't respond to whistles or voices so more man power and tools are needed to search.
On a board at pinckam notch, we have a sign who describe the ten essential for an hiker. For climber, we don't have those think. Which technique do we have when the situation are going wrong. Going to camp at havard cabin in a very cold weather before going to the top, knowing how to bivy with a bivy bag, a pad and a sleeping bag, knowing three or four crampon technique, body x position and more advance technique, climbing in good weather before going in a white out, etc.
actually, we have a sign who work like a light. If it is green , just go through the intersection without worrying. If it is yellow...you take a chance to have a ticket...but nobody died from having a ticket. and if it is red...nobody will go in the mountain. That situation bring two problem: first, the signalization can be wrong. An avy post could be low and you can have an avalanche. second the climber is not responsible.
Gave an other number than 911 for rescue and stipulate that it is not a free service. As the people have to call and be charge for the call...you will see that just the one who really need to be rescue will call.