Facebook kinda lets you do this now. Filling out a preference sheet, that is. Buried in your ad settings is a list of what FB thinks are your interests. You can

Facebook kinda lets you do this now. Filling out a preference sheet, that is. Buried in your ad settings is a list of what FB thinks are your interests. You can remove any that don’t match. Doesn’t always work though. You can remove all “interests” related to meat, and then still get slammed with steak ads after you clicked “like” on an article criticizing the beef industry. There seems to be a shadow list of interests that the user can’t see or edit. The one combo that does work over time is deleting interests and consistently choosing “Do not show this ad again” for the unwanted subjects. But that’s more work than most are willing to do. I only did it because the ad system is interesting to me and I wanted to see how trainable it is.