Not for nothing, but slippery slope reasoning is a well-known fallacy and more or less an argument against all laws ("first they told me I couldn't kill anyone, now I can't hit anyone, now I can't talk about hitting anyone, now I can't write a story about hitting anyone or think about hitting anyone, murder laws are fascism"). The process of creating laws is about balancing rights, in this case your ability to advertise vs. your ability to be free from advertising and whatever its effects might be. The whole "banning advertising is impossible" argument (in fairness this basically the topic verbatim) is a lot less interesting than trying to find the principle or test where we can say, "this advertising seems useful to humanity" vs. "this advertising seems harmful to humanity". There's very little of the latter happening in this thread, which I think says it all.