I never understand someone saying that someone else is ignorant just because they feel differently about a situation than the other person does. For whatever reason if someone says no when asked if they can share your table, it's their right to do so. You may not like it, but doesn't mean they're ignorant.
We prefer eating at less busy times so the restaurants aren't quite as crowded. Less chance of someone wanting to share a table. I don't see anything wrong with someone saving a table for their family that is in line getting food. If others don't like that, maybe they should wait for a less busy time to eat.
I do agree with those saying a counter service restaurant is not the place to just sit at a table to rest though. Plenty of other places to rest.
When DH and I go to WDW, or my DD and I go, we don't eat at peak times. Still, I wouldn't ask to share someone else's table. I would wait for a table to open up. I wouldn't take a large table for just 2 people though, I would wait for a smaller table to open up. I just don't care to share a table with strangers. Sorry if others think that is rude. Now maybe if they would just sit and not want to make small talk it would be okay.
I just don't care to chat with them while we're eating. I don't care where you're from, where you work, how many kids you have, blah blah blah. Just eat your food and be quiet.