Why do you necessarily think they are all hired developers? I find it surprising that you and many others are surprised and even upset by this story.

Imagine someone never having used vim, maybe new to Unix overall, or new to terminal programs. Maybe this person is a student and is trying to learn. In some way he ends up in vim and it is not very intuitive how to exit it. The person searches for "how to exit vim" and find that SO thread and learns how to exit vim.

Does that sound so weird? If you act in a similar way towards colleagues trying to learn something new you should rethink your behavior.