Does Philosophy of Religion get a bad rep? Yes, philosophy of religion probably gets something of a bad rap... But that's mostly due to the sheer volume of utterly incompetent discussions of philosophy of religion (especially online), mainly from fanatics and committed partisans, who are almost without fail completely unschooled in academic philosophy- and so its just sloppy and uninformed and amounts to little more than a personal confession.
I think most people can distinguish this, from the actual philosophy of religion, which is a perfectly respectable discipline and much of the time is every bit as rigorous as any other in philosophy (and so it comes down to ones personal interests). And of course most of the "Great Philosophers" dabbled in philosophy of religion to varying extents (Plato, Aristotle, Descartes, Hume, Kant, Russell, etc). As always, its not philosophy itself that is the problem, just bad, sloppy, uninformed and ill-considered philosophy.