For Gramaretto - you're quite right, there's a subset of folk who haven't a clue where they're going, just expect it to be like Blackpool, but sunnier and warmer.
We went to Majorca a few years ago, the plane had all grades of tourists, some going to 'cheap & cheerful', others somewhere quieter. When the plane went over the Med, there were several loud comments asking why -- they hadn't realised Majorca is an island, thought it was a resort on the Spanish mainland. .
Sadly, geography seems very difficult for quite a few people. Watch almost any quiz on TV, and it's a topic that baffles lots of contestants (& not just questions about 'abroad'). There was a 'Tenable' a few years back, in the final round the team had to state the ten most southerly UK counties. This drew answers like "Lancashire" and "London". They didn't win.