The majority of "content producers" on the web have little to no cost and produce little to no original content, let alone worthwhile content. Even for the subset of content I personally enjoy, I recognize that it is worthless - I would not pay a single cent to access it. If it were paywalled I would simply go without it. Serving ads alongside content makes me enjoy the content less, so I block those ads. If you fight against this, your content becomes less enjoyable.
Except time. Sure work provides me with a desk, computer, power and lights but 99% of what they pay for is my time. Most of /. would be living on the streets if we couldn't put a price tag on that. Even if you're self-employed and don't cut yourself a paycheck doesn't mean anyone else has the right to demand you give it away for free. How are most blogs not original content? This diatribe is original content, I mean I don't expect to get paid for it but if I wanted to I could put it up on a blog and see if people would suffer some ads to read it. It's not like you have a right to read it for free just because I wrote it for free.
When I go shopping I think paying is a real downer, it would be so much more enjoyable if I could just go into the store and grab whatever I want to. Life's tough that way sometimes, strangely it doesn't revolve around me and what I'd like the most. I don't buy into the "not watching the ads is stealing" tripe, but arguing that turning an ad-based service into an ad-free service is reasonable simply because you enjoy it more is basically pulling a Darth Vader, "I'm altering the deal. Pray I don't alter it any further." without any moral justification for why you should be entitled to their content for free. Ad money is real money and you're actively avoiding rewarding their work.
Let's for argument's sake say the site turns to obnoxious ads and anti-blocking measures. You either stop reading or stop fighting the ads. If they lose you as a reader they lose you as a freeloader so what exactly have they lost, the privilege of you reading their blog? Talk about hubris. Or you end up watching ads and become a customer, they make money. You talk as if they they're the ones losing by pissing you off, but how could they lose anything when they got nothing from you in the first place? Aren't you just crying for yourself and when they shove you out the door you pout like a child crying "I didn't want to visit your stupid site anyway!"