This seems like a dirty game that noscript is playing. They are intentionally subverting the intention of the AdBlock plugin. Blocking ads is the intention of the user because the user installed the plugin. Therefore the noscript authors are subverting the intention of the user. Users (some) will put up with this for a while, however if it gets to bad a new "noscript" will be created. It will be a fork noscript is open source or it will be a complete rewrite. There only way this can end well for no script is to not "go too far with it" that it really pisses off users/developers. What "too far" is, is what is under debate.
Since what is being blocked is mostly ads from ad servers, can it be claimed it is "part of the content of the page" as some here have described. With snail mail some companies place ads in with your bill. IMHO that does not make the ads part of the bill.
However I think this can be a security risk, as ads servers can be a vector for attack. I was listening to a respectable internet radio station that required that I run IE (I know, I have to live in the dark side once in a while). I came back later and found avg saying it found a virus. After some investigation I noticed an ad on the internet radio page had the url, file://c:/windows/system32/. And when I visited that "url" exactly avg popped up again. Now I always block ads when I can (and try not to use IE) because the author of the page has not authorized each ad to be "part of the content". I would hate to live in a world where it was "part of the content" and sites where responsible for the ads that got served. Then again, maybe there would be less ads that way.
Anyway, just my 0.02 cents