I do exactly that and guess what, I will continue to do that not because I'm stealing time, but because I like to eat and take a break and try to digest a little before getting back in the seat. After I eat, I am refreshed and ready for the second part of my day and sorting for 5-10 minutes helps me to clear my head, plan the rest of my day, and double check for misloads and lingering businesses that will need to be taken care of before 5.
Just because I go inside Taco Bell or wherever to eat and clock out for such, I am not going to go run a stop or two just to look good for some report. Once I retake possession of that brown shtbox, I'm going on the clock and if sorting takes 5-10 minutes, so be it. If they think I'm stealing time by doing that, get a camera or put someone in the car with me to prove otherwise.