Re: Same here
"And yes, I did once work for an Ad agency"
Do you know if the industry has ever attempted to measure the net effect of advertising? They can easily say x% of people who saw an ad bought from it. But if y% were so pissed off that they made a mental note never to buy that product the net effect is actually x-y% and that could very easily be a negative number.
I doubt its something that could be easily researched. I also doubt that anyone with any sense in the ad industry would avoid doing that for fear of what they might find but there seems to be sufficient arrogance that the possibility of finding something to burst their bubble might never occur to them.