> The hope is that the person installing the software doesn't actually read and uncheck the box Yes. Because you have the "don't care" group being the importan

> The hope is that the person installing the software doesn't actually read and uncheck the box Yes. Because you have the "don't care" group being the important group. The users are split into a small group being positive (The would-opt-ins) and a small group being negative (the people arguing it must be opt in) and a large group who don't care. The central "don't care" group is so large that the data is almost useless without them - i.e. you could just as well not have the system at all if you were going to do a full opt-in. So the unchecked box alternative really isn't an alternative.