Scored cam journals are easy. I have seen this on more than one engine and on more than one brand. Let your car set outside over night at 40* below zero or colder without a block warmer. Plug it in for 20 minutes or so and fire it up. If it starts it may run on a couple cylinders, than a couple more and then all will fire. Do this crap every night, all winter because it costs too much to plug it in all night and you will screw up the cam journals on the 5.4 in your truck. This treatment will do the same thing to the 2200 six banger in a Toyota pickup and it will destroy the top end of a small block Chevy. People do this kinda crap all the time.
To the best of my knowledge, the EcoBoost was stock. I also thought Ford had engines programmed to shut down before they would burn up. I agree with your driver induced statement.