Dave,
The line between fly-fishing and other means is gray at best. Many fishermen in the Rockies fish flies with spinning outfits and bubbles. Or they'll fish a fly rod with a spinning outfit and weighted nymphs. So I don't fret about what's a 'fly' or not. Did you tie it? Then it's a fly. How it gets used, maybe ear-rings, doesn't change what it is.
I tie a lot of 'flies' for fishermen other than flyfishers. These are castable with spinning outfits or trollable with conventional gear. They are still hand-tied, so they would qualify as flies, although they mimick fish. But that doesn't stop people from calling streamers 'streamer-flies'.

These are my largest examples so far of 'flies' NOT meant for a fly-rod, but for trolling for marlin off Cabo. (double 12/0 & 17/0 Deceiver patterns)
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