I always throw mine out. Makes the draw a lot better and leaves room for a pipe cleaner, if needed. All the restriction I need, I can get from packing the baccy.
Being new to cobs myself I'm glad that the filter was covered, otherwise I would not have thought to look for a filter until it was gooey. The size is akin to the 6mm Savinelli balsa wood filter so if you want one for some reason, the balsa wood type can still absorb a little moisture.
Yeah, I'd try it both ways to see which you prefer. If the pipe was designed to smoke with a filter I tend to use one. It does help keep everything dry, but proper smoking and drying of the tobacco goes a long way towards fixing any problems in my non-filtered pipes.
I always chuck mine. I one time forgot to remove one and wondered why the smoke was "different." Removal of the stem revealed a soggy filter which I promptly chucked.
Yeah the general consensus is to take em out.
...general consensus next to a picture of the general! I'm dyin' over here! LOL!
I remove filters regardless of type of pipe (so far anyway). Haven't had the chance to try the wooden type filters yet.