Similar to that of drink driving, but driving whilst using facebook. Face-driving is becoming more common in today's society and is hard to enforce especially when you have a good reason to be on facebook while driving making it hard for police to do anything at all as they do it themselves and completely understand you must constantly check status updates regardless to avoid becoming a social hermit. It's just the way things are these days.
I was driving home from work today when i caused a four car pile-up on the motorway.
Police: "It appears you caused this accident, can you give any reason as to why this happened?"