Sounds to me like you are already enlightened in this respect.
" the notation for the presidential alert informed my that it could not be disabled."
Okay, now I feel like a real dope. I wanted to learn more about the “Presidential Alert”, so I went to my go-to tech education source, i.e., Youtube.
The guy in the video explaining how to disable the Amber Alert shows the pop-up menu that has “Presidential Alert” on it. He explains that it cannot be disabled. Well, this tutorial was posted in February of 2015!
Oh, well, so much for my “discovery”.....
I just checked my iphone - there is a setting for ‘government alerts’ that I can turn on/off...I left mine on, of course...