When a forum gets over run by everyone trying to be that guy and troll.
Hipster Troll: /funny image
HT2: /related unfunny image
HT3: /related unfunny image
can't use links so that example is out, but posting an image then having 10 other people do the same thing after the original poster posts.
For verification of hipster troll's activities, go to the first page for "hipster," write down the number of thumbs down given for any critical definition, and then come back the next day to see 20-30 more thumbs down. Similarly, go to the positive definition and watch it go 25 thumbs up in a day.
Mom: "Those hipster losers still won't like you hun. You better just go to work now."