Unwanted junk or email
What is CAPTCHA?
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
Something that lives under a bridge