I'd be happy if all ads became served from the same domain, an integral part of the page (no popovers, popups, focus stealers, etc) and not-dynamic. That would remove 90% of my objections to them.

Third party ads with javascript can and have been used to introduce malware, through deception or zero-day/drive-by exploits, even on otherwise reputable sites. It is for that reason that I block ads.