I find many of the ads to be either offensive, insensitive or completely irrelevant. I saw one pushing a "herbal remedy for autism", for example. Even if I supported the cureby point of view, "snake oil salesmen" are something to be avoided.
If you're getting paid based on click-through then blocking ads I would never EVER click on isn't costing you anything and increases my enjoyment of the site. It also loads and renders much faster when I don't have to download external images (both advertising and avatars) and run javascript programs.
If you're getting paid per-download then I'd consider using "hide ads" instead of "block ads" so you still get paid. Given the technology war against advertising, though, don't expect pay-per-download financial models to last very long because the advertisers know many of those downloaded ads are never displayed.
It's kind of ironic that you need ads to pay for bandwidth, when the javascript that inserts those ads takes up so much of the bandwidth in the first place. BTW, there are free css optimizers that can make your pages much smaller.
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What would Flying Spaghetti Monster do?