These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Dude, Not Funny!: Every so often, some users like to spread a rumor on Twitter that some celebrity has died when they're still very much alive.
Or even worse, joking about city council budget cuts.
Fan Dumb: Good lord there is a reason so many people have grown to despise Justin Bieber and One Direction even if they were at worst neutral to them before. Beliebers and Directioners (among others, but they stand out the most) take it upon themselves daily to start trends about them for almost no reason, get in the way of actual world events, hijack anything tangently related, and get offended en masse by other users (or even Twitter admins) wanting them to just shut up already.
Notably, "CALA BOCA GALVAO", a complaint against an obnoxious sports announcer that somehow became a campaign for saving endangered birds.
Hate Dumb: There are people who refuse to get a Twitter account because of excuses like "I don't want people to know I'm on the toilet", etc. Never mind that it's up to the user to determine whether or not they want to make posts like that.
And then there are those who refuse to register because they think other people's streams are nothing but shallow self-indulgent posts, so not entirely fair.
Hype Backlash: As with any website with social networking elements, it gets quite a bit of this.
One such instance happened during the Suzuki AFC cup finals first leg where Malaysia won 3-0 against Indonesia and Indonesians accused Malaysians (which was the home team at that time) of pointing laser beam at its team's goalkeeper, despite there are proofs of Indonesians did it at first during group matches. It managed to top the trending for a few days, outdoing Justin Bieber.