The thing that annoys me is the folks that don't give the question careful consideration. It's an important decision, it should be given some thought, not just be a throwaway "oh I don't want to worry about it when I go back to work."
true.
But lets consider how they might see it. Finding the time to pump all day or leak through your shirt. Some women don't have office jobs or neat little bathrooms to use for this job.
Freezing the milk, thawing the milk, hoping you don't skip a pumping session or risk mastitis.(sp?)
If you believe that bottle feeding is as healthy as breast for your baby then something as simple as the above reasons would be enough to sway you to not breastfeed.