I personally have no problem with fish attractants.
However, this statement from Bob Boese's article "Fish Perfume" is NOT correct in Colorado!!!

Wive's Tale #4: Using fish attractant is illegal. Simply false, even on the most restrictive gold medal fly fish only catch-and-release waters, no prohibition against attractant on flies has been found.

Not false at all!
Fishing a scented fly here in Colorado "Flies and Lures Only" water will get you a ticket and points on your license. From the Colorado regs, 2008-2009:

ARTIFICIAL FLIES AND LURES: Devices made entirely of or combination of natural or synthetic, nonedible, nonscented (regardless if scent is added during the manufacturing process or applied after) materials such as wood, plastic, silicone, rubber, epoxy, glass, hair, metal, feathers or fiber, designed to attract fish. This does not include anything defined as bait below.
BAIT: Hand-moldable material designed to attract fish by taste or smell. Devices with scents or smell attractants added or externally applied, regardless if added during manufacturing or after. Scented manufactured fish eggs and traditional organic baits, including but not limited to worms, grubs, crickets, leeches, minnows, dough baits, stink baits, insects, crayfish, human food, fish, fish parts or fish eggs.

If'n your flies are scented, here in Coloraddy yer fishin' BAIT.
DANBOB