Some Anvils Need to Be Dropped/Headscratchers


 * Sometimes I see links to this trope when most people would agree with the anvil being dropped. In which case... why does it need to be dropped? People clearly already get it.
 * Because sometimes just "agreeing" with something isn't enough; it's about reminding people why they agree with these anvils. It's easy to forget the "why" part. For example, most people would probably agree that, say, the Nazis were bad, and they'd probably be able to give a solid answer why. But it probably wouldn't be a very emotive answer, because for most people the Second World War and the Nazis are by now something remote and distant and hard to connect with. Write a novel wherein the characters these people are able to relate to are suffering directly at the hands of the Nazis, however, and you can bring it closer to home exactly why we view the Nazis as being evil, more than you necessarily could just by reading a more abstract history on the subject.
 * Actually no, it's because of trope decay, because as mentioned above, it has nothing to do with whether people agree with the message. It has to do with how it works In-Universe. People say J. K. Rowling's stance on racism made her story more effective. Almost everyone agrees racism is bad. Hence: some anvils need to be dropped (for the record, that page is desperately in need of a name change).
 * And in some cases, to avoid Do Not Do This Cool Thing. For example, Pleasantville was quite blunt in its message of "The good times you felt in your childhood were not as great as you think they are." This is because if it weren't obvious, a lot of its audience would see the idyllic 50s Suburbia Sitcom setting as something to strive for because life is so peaceful and innocent, rather than the sterile, meaningless, and stagnant world that it was.
 * That's you're opinion. The '50s may be portrayed too nostalgically, but right now can be described as crude, shallow, meaningless, and (if the entertainment industry is any indication) increasingly unimaginative (read: boring as hell).
 * It mostly depends on how relevant it is to the real world and/or how strongly people feel about it. Oh, and how many people feel strongly about it.