What that guy has done is all good if you have extra money and I'm not picking it apart, but I have no requirement to notify people that they are breaking the law. Police don't need to notify and inform me about gun laws, that's my responsibility. I see 911 usage as the same thing.
Wimwag, I agree with what you say, but I also see what the guy in the video is getting at.
A person could call 911 and even if they knew it was improper and fall back on the "good faith" protection.
Even if they had done so several times in the past over different incidences, you would have to dig up the older 911 calls and show that they had been informed in order to cancel the good faith protection of the newer call.
While it could be prosecuted, proving their knowledge and/or intent would be extremely difficult.
But with his legal notification to the person, while the first 911 call is a gimme under good faith, any other calls would be much easier to show abuse of the 911 system.
The problem there is that different carriers would not know of the letters unless someone creates an online database on who has been informed and when.
I could see this as being effective against someone you would encounter on a regular basis.