I use adBlock, but I disable it on sanely-run technical sites, where the ads actually will be relevant to me (and not rubbish about "the secret to weight loss"). E.g. LWN. Also, it's my understanding that the adBlock I use still fetches the ads - it just hides them. So the use should be invisible - though it obviously does devalue internet advertising.
I'm also more than happy with the LWN paywall model. It keeps the site interesting even for non-subscribers, and it doesn't prevent subscribers sharing.