My contention is that if you want to, you can make ads nearly indistinguishable from &quot;content&quot;.<p>On the extreme side, I would say that I have won this bet already; if you pick up something like the Wall Street Journal and count the number of articles that someone involved <i>wanted printed</i>, you&#x27;d find that most of what you&#x27;re reading is one kind of ad or another.<p>But there are technical solutions as well.  Obfuscation beats machine parsers for at least the foreseeable future.