Nothing gets me more agitated than the growing trend of people on Twitter who, after I return the favor of following them after they follow me, immediatedly unfollow me.

It’s arrogant —> they beleive that they are so good that people just need to get exposed to their tweets and they will never go away

It’s rude —> They are basically saying they are better than you since your tweets are not worthy but theirs are

It takes advantage of novice tweeters —> They hope that they can get their follower/following ratio up by hoping that a novice tweeter will not realize they were immediately unfollowed

So uncool.