One thing that I have little patience with is the view that dismisses philosophy all together. The view that there is no progress in philosophy is itself a philosophical view. The view that all knowledge is scientific knowledge is also a philosophical view. When people say that philosophy is a waste of time they invariably mean one particular way of doing philosophy is a waste of time. This is clearly illustrated by people like Richard Feynman who spend a lot of time denouncing philosophy in general when a closer looks reveals that he was pissed off about the method used by particular philosophers (that he happened to encounter). This is also born out by the anti-philosophy comments at the linked posts. If you do not like thought-experiments, analysis of ordinary language, or scholastic proofs for God’s existence that is fine, but that is not the same thing as not liking philosophy.
Philosophy is unavoidable. You cannot even say why it is worthless without actually doing some philosophy; that is part and parcel of its suckiness. I think it was Aristotle who first voiced this sentiment, (though I can’t seem to find the passage any where in my Barnes anthologies)…anyways. Deal with it.