I would argue that there are to factors that are in play here that need to be focused on. The first is that in this forum we as a group are fundamentally aware of the manipulation of wine in order to create a product that the market "demands", the general public is either not aware or chooses to remain oblivious. Second, the business of making wine and being profitable at it in turn directs many producers to pay heed to the market versus the terroir.
I was approached recently at a dinner party by the host and they asked me to be honest about their choice of wine. The host, knowing my profession said, "I sorry about the wine, I just do not know which ones are good." My response was, " There are no bad wines, there are just wines that are made differently." While at one point I was attempting to be diplomatic I think the the comment had poignancy when it comes to the fact that as a whole most people are unaware of the practices involved. I for one think that listing the ingredients on the label may seem the only way to introduce the practice to the public at large, but I think that it would be detrimental to the image of wine and the ability to charge a premium for wines. Even though the practice exists does a large portion of the customer base care? I would argue no.
A call from my sister last thanksgiving gives a little glimmer as to the power of the market. She was in the wine aisle of the supermarket and had already selected her wines. She wanted to know if the wines that she had chosen we "good" (again this notion of good or bad wines). Before she could mention what she had purchased I said to her, "you have a chardonnay and a red wine and they have cute animal on the label." Her response, "yes, how did you.." I interrupted, "Then sis you have the right wine for you." The power of the market at play. Producers need to stay in business and if that means using the cute cuddly critter marketing and producing wine that is adulterated to meet market tastes than that is what they will do.
I think that for right now keeping the elephant in the closet is best. I feel it is our job as sommeliers to take these "market tastes" and lead the customer away from their comfort zone.
Now should a wine that is manipulated falsely claim that it is expression of terroir. Perhaps labeling could be the answer, but not the ingredients. We have "Estate" on labels why not something similar for those that choose not to manipulate?