Yes, file formats /can/ be seen as a different issue, but its often the reason I end up using proprietary programs.

One can have a closed program with a open file format, but not an open program with a proprietary file format, why? Doesn't it suggest an interesting link between proprietary programs and proprietary file formats? Do you still think they are really independent issues?

Exactly. So comparing it to slavery is ridiculous.

You're right though, they are interlinked. Still, no one is forcing anyone to use proprietary software.

However, he is making a valid point and you are neglecting to see it.

Not everyone is a super-man that can ignore the influences of their environment. We have to deal with other people and their sometimes strange ideas and you're assuming that we don't, or at least you're assuming that there are no negative consequences for ignoring the rest of the environment and doing what you want.

You're right. I don't think there are. But then I'm completely against the minimum wage for similar reasons. You're not forced to get a particular job.

Sure, but can you have open free programs and closed, locked-down, proprietary formats? It's a separate issue, perhaps, but it's a very closely related one.