Congratulations, you installed "peripherals" in a 911 center so now you're an expert on call volume and triage everywhere. Give this man a headset! Ha. You have no idea what you're talking about. If everyone waited their turn and called one at a time, you might have a leg to stand on. But since that isn't how it works, I suggest you go back to installing and let the dispatchers do the dispatching.
Your comparison is invalid. Your modifying the switch that has to handle and route 911 calls. Of course you have to test it and its pre-arranged. You're doing planned "official work on the official system". This is not a comparison to calling 911 on your personal cell phone interrupting other real emergencies to see if your phone works. Try comparing apples to apples if you want to present a valid debate.