Is there any EASY way to disable the pinging alarm noise that sounds when you first put the key in the ignition?

 

Yes you can but you might want to move this question to your truck specific section. Here's a couple of links on how it's done on the older models. I'm guessing it will be the same with your truck.
https://www.ford-trucks.com/forums/6...ml#post5090015

https://www.ford-trucks.com/forums/3...lly-quiet.html

Good luck and be sure to carry a spare key if you don't have a door keypad.

 

Check out post 11 in this thread. I give the instructions along with pictures.

https://www.ford-trucks.com/forums/567156-beeper.html

BTW that thread is referred to in the Super Duty Tech Folder (the first thread in the Super Duty forum). You really should check out the tech folder as it has links to a lot of good information. Here is a link to it also.
https://www.ford-trucks.com/forums/4...lder_____.html