Ads are the problem not for those who click on ads and feel excellent about it, but for those who don't and get unwanted content shoved down their throats. If t

Ads are the problem not for those who click on ads and feel excellent about it, but for those who don't and get unwanted content shoved down their throats. If the "higher probablity" from your comment is tiny, which it is, then the latter group is roughly the same as that exposed to generic (and equally unwanted) ads. That is, profiling does very little for the vast majority users, but at a cost of massive privacy issues. Trying to look at one without considering the other is disingenuous at best.