Not on Wednesdays in areas without anyone to enforce or enact noise restrictions, OR any neighbors for twenty miles. I wouldn't ever dare take this little beast to a place like Tillamook where someone might actually care about noise. Not only would it be impolite to all the people in the forest doing things besides riding (hikers, people living ten miles away, etc.) but it would also get me one hell of a ticket. At this spot, and on this abandoned day, we didn't even see nor hear another human being. All the noise did was make my ears ring (my bike was the quiet one, by the way) and alert the deer that we were coming so that we didn't hit any of them.
Besides, that pipe is designed, built, and tuned to operate the way it is, and when you tack on a silencer, it changes the way all the waves inside work, the timing goes off, and the legendary power disappears. Not only that, but the last time we put the silencer on, it cracked the pipe from all the leverage. If my options are to run it loud, ruin the bike, or park it in the garage forever, I'm going to run it whenever I can (which translates to once a year when a "nobody's around" moment pops up.)