anyone read sir terry pratchett's book "maskerade"? this is his take on the phantom of the opera. there the ghost leaves messages for the theatre owner - notes littered with exclamation marks. the number is remarked upon in the book - can't remember exactly what was said.
however i tend to use several exclamation marks when posting on social media [and in emails too i suppose] - i use them to show emphasis as this is difficult to portray in text.
Infuriated by this man's attitude
!


