Walking Billboards

I was asked to do an assignment to attempt to avoid advertising for a day for my persuasion class.  Its obvious that this was an impossible task but it helped me to think about what the hardest advertising to avoid is.  You would think its internet ad's since they are on every page you go on, but honestly I believe that people are the hardest advertisers to avoid.  What people wear, what logos, what clothes and what people want to buy I think is a huge drive on the advertising front.  When people chose to wear logo'd clothing like nike they are advertising for them.  Social proof between people increases this even more and people themselves become a walking billboard for these major companies.