I shave mine regularly at the same time as my taint, sack and rest of my bits. The thought of having hair their just strikes me as nasty. Your s**t runs through it and there's no amount of wiping that will really do the job with lots of little hairs to catch that debris.

Maybe if bidets were common in the US I'd stop shaving, but I don't see that happening. US citizens seem quite happy with their rancid bung holes.