Barbless - sure. Single barbless, no way.

Single barbless for bait would be fine, but I personally feel a barbless siwash will do much more damage to a fish then a barbless trebble.

Of all the salmon and steelhead I've caught this year on barbed trebble hooked plugs, *none* have been hooked deep. I see no reason for the single barbless rule when it comes to floating lures.