This is the appropriate emotional response. Kudos to you. Thanks for not being a tool. I would say, though, that the reason it's a "pretentious wanker" move

This is the appropriate emotional response. Kudos to you. Thanks for not being a tool. I would say, though, that the reason it's a "pretentious wanker" move isn't because they work remotely but instead choose to work silently in a public space not designed for it, essentially for free. Paying for coffee, pastry, whatever and using the place as an office is not providing the appropriate monetary remuneration to the business for having an office space.