Not sure how much you can blame Spot for "Yuppie 911", the same problem applies to cell phones and presumably to PLBs once the $300 unit becomes widely available.
At least they offer insurance as part of the fee (perhaps they could include it in the fee) which is a good step.
The current issue almost exclusively is SPOT related. Unfortunately, bad reporting has resulted in the term PLB being used interchangeably for SPOT. Everything else pales in comparison. When the state SAR coordinators and the others involved at higher levels are talking about this, they are talking about SPOT. They have been dealing with cell phones for enough time now that they have a handle on that and being two-way communication, can weed out many of the questionable alerts. Not so with SPOT.