Good luck. When I have talked to people about advertising in general, I've found that they just don't care. Apparently it is a very special mode of thinking where you consider your own attention valuable, attach anything more than 0 importance or cost to watching a message, worry about getting influenced (people will quickly think you are crazy when you choose this tack)... For sure I have found some people here and there who are sympathetic to this way of thinking, but if you want a wider debate about these sorts of issues I fear the first step is let go of your assumption that you can get people to consider your arguments at all if you'd just explain your reasoning clearly enough.