Via alixmcalpine
In May of 2012, Tumblr user LeonsBuddyDave made a fake Twitter account with the name "United Airlanes" (as opposed to United AirLINES). He posted a few gag tweets and then left the account alone. Recently, he decided to check up on the account just for kicks and saw that quite a few people had tweeted at the parody account believing it was the real thing.
The TSA's spent the better part of a year confiscating these Batarangs from passengers, and documented their 'catches' on social media.