But what you're saying almost implies that the guests are leaving WDW mad and eating outside of the park just to stick it to the MK. That's not the way I read the post you quoted at all. What I took from it was that they were deciding to not wait two hours for their return time because they prefer to use part of that two hours to leave for a mid-day break anyway, and since they are staying offsite, it's more practical to NOT pay Disney prices for QS food if it's not coming with the BoG experience, particularly if they were about to leave for a few hours.
The thing of it is, though, many people do leave during the day and come back in the later afternoon or early evening, especially when spending the day at MK. So I wouldn't be surprised if the person you're quoting is far from the only person who makes that choice, in fact I hear people say on these very forums all the time that this is their preferred way to experience the parks; if people who take said break can't eat at the place they wanted to while on property, might as well eat something cheap offsite and save a little cash.
That's not to say that people aren't getting upset about not being able to wait in line for an upscale fast food restaurant. As others have pointed out, people expect to be able to choose to wait for fast food. That's typically how it works. But while I doubt anyone is storming out of the MK and deliberately eating elsewhere to get back at Disney, I'm sure there are people who would decide to not eat QS in the MK if their money is not going to be spent on the things they were wanting, particularly if they were on their way out for a break anyway.
