Man.....adblocker is so harmful to sites that offer such free services as watching anime or reading manga.......it's really mean to adblock them if you're gonna use those sites 
It's one thing when they ask nicely, I.E. they get a small banner on the site that tells you they could really use your support and such. I've got an exception on my adblocker for Cirnopedia (it's a wiki-style reference site for PSO2) for that reason.
It's another when they block access to the site entirely until you disable the extension and bombard you with porn/dating site ads.
I completely agree. It's especially bad when the ads are completely obnoxious and unavoidable...
And, personally, i'm against paid ads on fansubbing websites, especially when said sites don't even sub the episodes they have on their sites, but rather rip from other fansubs and mercilessly upload them then ask for donations/fill the website with paid ads.
I don't agree with people that want to actually profit from someone else's intellectual property. A small number of ads/donations just to cover hosting costs is acceptable, anything else is not. Therefore i don't feel the least bit guilty about using adblock in those cases. Moreover, it's kind of dumb, because once they start profitting from it they open themselves to much more serious legal action than just a cease & desist and a takedown notice.
Way back when i just started watching anime i used to go to these websites that re-uploaded other fansubs series as really bad quality .rmvb files of about 50mb (really bad internet), and was really impressed they sometimes got donations in the several thousands mark, plus whatever they got in ad revenue for what amounted to basically no work at all. After all, all you have to do is recode the episode, which basically entails opening a program, telling it to recode and then leave the thing running until it's finished.
Once i learned that, i started drifting away from those websites and into the own fansubs page, and as a bonus, started watching much higher quality content. I also felt really bad that i condoned that kind of attitude for so long. I mean, other people did the heavy lifting of actually translating from japanese to portuguese or from english to portuguese, syncing, doing the karaoke and actually making a good encode, just for someone else to mercilessly rip their content without giving them a shred of recognition, renaming their release, and profitting on top of that. That's nasty, really nasty.
