I would love to try pure CBD. It seems like it would have perfect effects for me: anxiolytic, sedative, and potential anti-cancer benefits. If Wikipedia is to be believed, it's not even regulated in the US.
Well, researchers have found what they believe could be CBD in flax, so you might get your chance.
I've had good experiences with weed that other people consider terrible and I can also get away with loading a tiny speck of that damnable good weed everyone prefers into my pipe.
I wonder if most people who experience cannabis anxiety are also real lightweights. I too can get totally blasted from the most miniscule of amounts. I don't think I could ever smoke enough to develop a tolerance.
Overall though, the anxiety is just too consistent for me to risk it anymore. Maybe someday I'll be able to buy a THC free strain that's better suited for my taste.
I heard somewhere that c. ruderalis might be high in CBD. It might also be better suited for growing in harsher conditions than either c. sativa or c. indica.