Unpopular Opinion via Ads: as stated above in my example, I don't like Star Wars, so I'd post that, cuz I seem to be in the minority there, same with I Love Lucy, never liked the show. Just PLEASE be respectful of people's opinions, we're allowed to like/dislike different things!
AND
Ads that predict the future. You know the ones, flying cars, etc and where the hell ARE our flying cars dammit!