I hate marketing, I've gotten rid of cable and broadcast TV in favor of Netflix and other ad-free content. Much the same for music.
Yet despite having the option I've never turned off ads here on Slashdot; it's always in the same place, not massive or obtrusive, and generally somewhat relent to the content. I respect that they use the ads to support the site and I think this is one of the few commercial sites that respects me the same which is one reason I still come here after all these years. No massive page filling adds, moving ads, video ads, or any of the crap that is mentioned above. As long as it keeps that way, I won't turn off ads, and I'll even visit the sites sometimes when they are relevant to me.
If it ever changes from that, I'll probably just stop coming. Sure i could use adblock or the built in ad-blocking feature of the site, but if the owners don't respect me, why would I be interested in their services?