There are several reasons I block ads: I don't want to be tracked. And I don't want to be conned, gamed, decieved and/or lied to (and for most ads, this is their goal). But most of all, to me it goes back to a fundamental concept of computing: This is my computer, I'm paying for the network link, and I get to choose what enters my computer and how I use/display that data/info.
Sadly, advertising permeates our society and is forced down people's throats everywhere. Back in college when they had ideals, Sergey Brin and Larry Page of Google said, "We expect that advertising funded search engines will be inherently biased towards the advertisers and away from the needs of the consumers." They were right. The same concept applies to other advertising.
Does this mean that Destructoid or other sites might disappear because people like me don't want advertising? Yup, it might. But that's not my problem -- it's an "adapt or die" mindset. If they choose a less deceptive way of funding themselves -- straight subscription, crowd sourcing, whatever -- I'll decide whether their value is worth me paying what they ask.
Then I'll decide whether to allow their text, data, pics and videos, etc., into my computer, and I then I'll decide how I want to use/display that content.
There's an old saying in business: The customer is always right. If the customer doesn't like your advertising or business model, the business has a problem, not the customer.