I disagree with you, but especially the second part. Users advertise their interests by the subs they subscribe to, it would be very easy to target them. You could even go so far and let users up and downvote ads they think are relevant to them. The problem is more with the whole way reddit inc goes about how they interact with their users and power users. You shouldn't be openly hostile against your own users (except if you are the mods of askmen).