Being a foodie can be dangerous.
We are by nature inquisitive and analytical, and we're always looking for an idea or recipe to take and make our own. We look at food in restaurants and think "How can I re-create this at home?" We consider what we would change, how we can make things better.
This can be hard to shut off when you are, say, invited to a friend's home for dinner. Dining at someone's home is very different from dining in a restaurant. In a restaurant, you are allowed to be critical, maybe not openly to the chef, but you can go online, and pick the dish apart on your next post, without any real fear of retribution. By putting out a dish, and making you pay for it, the chef thereby opens their dish up to criticism, and interpretation.