Advertising is mostly noise in my environment, against which I develop coping strategies. Hidden within some advertising are threats (malware) which encourages me to adopt even more coping strategies.
Proving that there might be some unsolicited advertisements that I'd welcome is like proving a negative. That many websites I enjoy depend for funding on unsolicited advertisements - is understandable, in the same way that the Confederate Flag represents Southern Heritage is understandable.
My attention is my possession. It is not unethical to use ad blockers, and any advertisers or websites that cry out against the use of ad blockers are damn fools. What is more, my desktop/tablet/browser is a valuable resource to me, one that it is prudent for me to use carefully. Just as I don't leave them out in foul weather, or fling them around, so too will I take steps to prevent malware - and that includes using ad blockers.
I mostly enjoy the content I find on places like SlashDot, Wired, HuffPo, etc., but I have noticed that the more the owners try to "monetize" the content, the poorer quality the content is and the less appealing it is. While some might offer advertisement free content if I subscribe and pay - my cynical expectation is that I'll eventually end up with advertisements anyway, much like Cable TV was once offered as an advertisement-free venue yet became so congested with advertisements that I no longer subscribe. Having been burned by Cable TV, I see no reason to believe any promises that paid-for content will be advertisement free.