It seems most Adblock users are not especially proud of using adblock, nor do they support anti-advertising activism.

I believe they use ad-blocker for practical reasons, not ideological.

On too many sites, the invasion of pop-up windows and heavily animated ad has became an annoyance. Not only a visual one, but also a technical one. When a page loads, code sends a request to an ad server (+ sometimes third-party plug-in) to render the animated ads. Most of the time, these ads are poorly optimized. As a consequence, the computer’s CPU is heavily taxed.

Consumer is always right. If he can't stand ads for practical reasons then it might be the time to re-think how we operate.