Another perplexing complaint, these really do get you wondering as to how other people think. Someone took a vacation to the Gulf of Mexico and complained, on a review site, that "The water in the Gulf of Mexico was too salty. No one told me that there was going to be salt in the water. It was gross". The gulf is basically just that, a gulf that's connected to the ocean, so no surprises here.
However, we're wondering if maybe this person thought it was just a giant lake or something? We don't know, but writing a bad review because the Gulf of Mexico is too salty is another level of petty.