You started the conversation by replying to people bringing a picnic lunch in and sit at a c.s. table. This is your quote:
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"Sorry, but I view the outdoor tables as something for everyone to use
no matter where your food comes from. You have no idea if those tables would have even been available if that family didn't use them. They could have easily been taken by other people that got their QS meal before you did."
So you're saying something different now, thus the confusion. That's ok since now you realize that if you purchase something from that restaurant you are entitled to a table. I"m sure there are times of the day, times of the year, that it wouldn't be a big deal at all but folks shouldn't expect to occupy a table if others who just bought a meal needed it.