I love a good philosophical discussion. The problem is that I don't like the confrontation that often comes with it. Religion, by design, cannot be anything more than theory, and yet people treat their point of views like undebatable fact. Plus, people get so offended if you express a different point of view than their own, it can get kind of scary.
But I could never see it as a 'waste of time'. I mean, the value of time spent is purely up to one's own interpretation.