I guess this shouldn't come as a surprise but people are using their Facebook status updates to do their dirty work such as...

• Almost 25% of respondents found out their own relationship was over by seeing it on Facebook first.
• Around 21% of respondents said they would carry out a Facebook breakup by changing their status to single
  
• Nearly 40% of respondents have updated their status on Facebook so the person they’re dating sees they have plans.
  
• And almost 35% of respondents have used their Facebook status to make someone think they have plans, even if they don’t.