Before getting hot under the collar, I think a few questions need to be answered:
1) Do they own the land on which the Sarracenia grow? If so, they have the right to do with the leucos as they wish until such time as they become CITES-I.
2) If they own the land, are they harvesting the pitchers in a sustainable manner? I believe you can take a third of the pitchers without seriously affecting the plant.
If the land is theirs, and they are harvesting in a sustainable manner, then I think it is wonderful that they have found an economic use for them; that means they are less likely to sell the land to a developer who will moonscape it.
If the land is theirs, but they are pillaging the stands of Sarracenia, then perhaps some friendly education on how they might renewably use the land would be in order.
If the land is not theirs, and they don't have permission to collect, then we need to involve the authorities.
Rather than knee-jerk send nasty emails or make angry phone calls, i think a little polite detective work is in order.
It is far better we establish a good relationship with them, and encourage them to farm their Sarracenia in a sustainable manner, and allow them to continue to have a good economic use for the plants.