If you truly believe in free market then surely you must agree advertisement is a mass manipulation technique that should be illegal as anti-competitive technique (reinforces dominant positions).
If you're an anarchist/socialist then surely you've read or seen some talks by Noam Chomsky about "Manufacturing consent" and by now you want to burn down every TV station, bank and police station you can think of.
Even if you don't mind printed ads, if you're just a little bit concerned about privacy, you must be out of your mind that certain data obtained about you may be used against you and your loved ones
Who's left to defend that kind of degrading practice? How can we put enough social pressure on these people so they stop and develop healthier activities than to hijack our brains remotely?