I don't know about you, but I have personally committed to never (or so rarely as to practically be never) respond to advertisements. I'd love to be able to tell advertisers that they are wasting their money trying to buy my impressions and clicks. I'm also willing to pay for an ad-free but otherwise identical version of a product, and I think many of us here might be in the same boat.
If there were an easy way to do so, would you sign a pledge / publically commit to being "anti-ad"? One version of such a pledge could involve committing to buy a competitors product if you see a relevant ad.
(Note: Given that only a subset of online users might sign such a pledge, this might actually save the advertisers money, which you may or may not want to have a hand in.)