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www.evanwarfel.com/blog
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.)