Messaging spam
Messaging spam, sometimes called SPIM,[1][2][3] is a type of spam targeting users of instant messaging (IM) services, SMS, or private messages within websites.
Pornographic IM spambots[edit]
Spam-bots often sign on to popular messaging services like Kik[7] or Skype to spread pornographic images. Often if the user responds they receive a URL inviting them to a private livestream that will ask them to enter credit card details for "age verification".
These bots target random usernames; this often results in minors receiving unsolicited pornographic images.