The latest report on motoring from the RAC Foundation has found that 19% of under 24-year-olds have used social media while driving. All motorists have been aware of the dangers of holding mobile phones (21% have admitted to doing that), then the big danger became texting (38% of the under 44 year-old age group say they are guilty).  Now we have social media to worry about as well.  The idea of updating your Facebook profile on the move is probably quite attractive – until the update says, “Just crashed my car” – or worse.