Tiny Baetis mayflies are perhaps the most commonly encountered and imitated by anglers on all American trout streams due to their great abundance, widespread distribution, and trout-friendly emergence habits.
I can't see an advantage to filing, it would take waaaaaay to much time. I crush my barbs and have no trouble getting them out of trouts mouths. Plus a lot of hooks have micro barbs, and they crush easily.
jeff
I've heard that filing them can weaken the temper and make the points more brittle. On the other hand, you can get a point that looks like a Tiemco SPBL or a Knapek hook, which some think penetrates better and holds better. I'm just buying barbless hooks these days, on the advice of someone who fishes competition. If anyone knows what will hold a fish better these guys do.
"He spread them a yard and a half. 'And every one that got away is this big.'"