I often hear that but I don't think this is good at all. To be honest I am not subjected to a lot of ads today, but I don't want personalized ads because it always means the advertiser has incentive to collect info on me. Ads aren't worth that, not even close.

You might think otherwise, but for these cases I think there should be opt-in mechanisms instead of the assumption what people want. If they are that off with their ads...