There has to be some form of ad that is acceptable.
Personally, I think that a large part of the problem was created by the advertising industry itself. A lot of us remember the days of popups and pop unders and Punch The Monkey animated ads. Today, these are replaced by highly misleading ads making some download sites display no less than FOUR different "Download" buttons, misleading people into locating the real one. The ads industry need to clean up its act, and start policing themselves better.
Add to that the poor security of some of these advertisers, allowing malicious content to get pushed through their channels into legitimate channels.
And finally, some ads make website take nearly 3x longer to load or causing a lot of reflows (quite CPU-expensive on mobile devices). A few years ago, a website had a very interesting study where they compared various popular websites with and without ads, and measured the percentage of page real-estate devoted to ads. Some of these sites had well over 33% of the webpage content devoted to ads (might have been higher, it's been a few years since I read that article), versus 66% left for actual content.
These are the issues that need to be addressed for more people to be willing to deal with website ads:
1) A more active ban on any misleading ads (seriously, if those same ads ran on TV or in a newspaper, there would be lawsuits involved about misleading advertisement).
2) Better security. All ads providers need to offer HTTPS (to reduce the risks of hijacking), and better control what they push out to remote sites
3) A more balanced approach in advertisement volume vs content, both in terms of page space and load/render performance
I appreciate Google's efforts there, as they have quite strict guidelines for their ads. However that brings another thing that bothers me: last quarter, Google registered advertising revenues of $19.8B, up from $16.7B from last year's same quarter. Maybe some of these companies need to give back more of these revenues to website owners, which would allow them, in turn, to reduce the number of ads they have to display to cover their expenses. Fewer ads, less aggravating, would make users more willing to whitelist. Unfortunately at this point, this wouldn't happen overnight, as trust would have to be regained by the users.