I haven't done the dining plan for a couple of years, but I was following this thread because I used mobile ordering last week...maybe it's an issue of getting more "value" out of it than one is entitled?
Last time I used
DDP, my son was an 11YO Disney Adult. So with the new plan, he'd be "eligible" for an alcoholic beverage per the plan but he cannot legally have one. If I went to Sunshine Seasons and mobile order him a beer with his entrée for me to drink and have him drink a water, the CM never sees him. If I go up to the counter with him, it's clear he can't have an alcoholic beverage so he's getting a $3 sprite instead of a $7 beer. I'm not sure if that's what people meant because it's been a while for me using the dining plan, but that was the first thing I thought of when people mentioned gaming the system.