That was basically my point Grenage, if they want my business they'll stop using flash ads and popups. For that matter I don't feel too motivated to buy from a spammer either.
But in all cases I consider these highly annoying and intrusive ways to advertise, the only variable being the degree of annoyance they cause. Some people may dream of an ad-free utopia, but that's pretty unlikely. There was a time when cable-only TV channels were ad-free, but it didn't last very long. I imagine the premium channels have ads now, but I wouldn't know that from personal experience.
If I had a choice I'd ban PDF files from the web too. This is a separate but related issue. Generally these aren't ads at all - but like unnecessary flash and popups, PDF files and Java applets degrade the web experience. Running into these is like suddenly turning onto a water-saturated dirt road. "Gear down, here comes a PDF."
The result is a web site with a decidedly unprofessional feel. Certainly one I avoid in the future.