A series of questions used as a test for intelligence in a computer
This identifies the robots from the humans so you will be able to make an account
what does .ac mean at the end of a url?
What is a sock puppet
False identity online
What is a Troll?
In Internet slang, a troll is someone who posts inflammatory or off-topic messages in an online community, such as an online discussion forum, chat room, or blog, with the primary intent of provoking readers into an emotional response