Apiece of code that is capable of coping itself and typically has determental effect such as corrupting the system or destroying data

Malware, not sure what else would fit that description.

He receives emails for free phones and insurance that ask him for his information by third partys

Reddit is  an american  social news  sharing service, web content  rating, and  discussion  website.  the name "reddit" is a  play-on-words  with the phrase "read it",  when items (links or text posts) are submitted to a subreddit, the users, called "redditors",  can vote for or against these links or posts (upvote/downvote).