@ryanc Or, more broadly: 'What will the behaviour be of a user that doesn't think about these things'.
The canonical example is of security dialogs where users are trained to click 'okay' without reading them, but there are a lot more things related to defaults, positions of icons, and so on.
Unfortunately, the problem is usually not caused by people failing to think of these things. The problem is that the people that do think about these things do not have the interests of their users in mind. They are trying to manufacture consent for things that have negative impacts on their users.