Interesting how you seem to be proposing the ad industry takes responsibility for stopping the greenwash & the more loathesome (imo) ethics wash. A long while back I used to write copy for a large developer client which sold little boxes, marketing them with undersized furniture, so they looked more spacious. To write the truth would have lost the client and the best part of 3 staff.
I'm not proud of the estate agent jargon I used to get the ads signed off and the issue is a threat to ad land credibility - BUT a client will always understand their absolute proposition better than a creative working on an account. It's the client's responsibility to stand up to an over enthusiastic creative proposal, hence the sign-off prior to go live.
Client side, we're in a great position to green wash and take more immediate market share - but staying on the narrow path has a greater prospect for longevity in this increasingly open age. Our mission is 'lovemark' as KR calls it and we believe that comes with an honest intent, a quality proposition and an effective open communication strategy.
Neil (founder: justdrinkingwater)