Sometimes. I like the newer Google AdWords links the site's using. At least they're context-sensitive for the most part and there's occasionally a good link to something in them. At the very least, I'm supporting the site by clicking them. I tried the paid subscription service for awhile, but didn't feel it was worth it for a casual browser/poster like myself.
I'm getting a kick out of how childish and irritated some people get about the ads. You'd think the ads encompassed 95% of the screen and made it impossible to see the forums rendering their overclocked systems completely inoperable.