I'm of the opinion that advertising is immoral.
Do you like the existence of Google? Should the Internet be purely pay-to-play like in the old AOL or GEnie days? For that instance, should Slashdot exist?
Yes, by the end of your advert I might "want" your product that I'd never heard of, but as the OP says, "fuck you". You are taking money out of my pocket that I did not plan to allow its removal. In some circles, that's theft.
You know what ACTUAL theft is? Consuming someone's product (ie. visiting an ad-supported web site) and then refusing to pay (ie. allow the ads to be shown). If you want a moral and ethical ad-blocker, implement a plug-in that refuses to let you visit any site whose ads you don't want displayed, or which allows you to pay micro-payments per visit.