I don't know the current state of public access these days, but theoretically it's still out there. Now, if enough people are doing 1 through 6, the focus groups will be working overtime to try to figure out what the hell is going on, which is why it'd be so cool if you can participate in these, taking industry money to mess with their heads and give them crummy information. Give them bad information, but give it honestly and sincerely, and don't let the facilitator or the other members of the focus group talk you around to their point of view. This information they gather will be used to tailor and target ads toward the demographic group they're after. Advertising is all about demographics, so the more you can futz with their attempts to buttonhole an age group, the better.
Bad information produces bad ads, and costs the industry money.
This is for the artistically inclined, and it's fun. Check out Adbusters for some examples. Or you could change the graphic of an ad and put some other message. A good culture-jammed ad is one that your everyday consumer might not even notice right away, because they're so used to either blowing off ads or passively absorbing the message. As I'd said, check out Adbusters for some examples, because they've been doing this for years.