Of course I would to run a few tests to run my hypothesis, but an almost too easy feature could make this avoidable: the ability to remove from demographic peop

Of course I would to run a few tests to run my hypothesis, but an almost too easy feature could make this avoidable: the ability to remove from demographic people who like X. That way, if you want to target people who like Apple you can also avoid people who like HP or Dell. An easy enough solution, that Facebook should look into.