[cinisajoy]

It is called covering your butt.  Just do it.
Movies do it too.  Though I must admit it looked odd at the end of a Jesse James (the outlaw) movie.

 

[cinisajoy]

Mine is going to say,
This is a work of fiction,  if you think you are in it, you aren't and please check your ego.

 

[cinisajoy]

You're so vain, I bet you think this book is about you...

I would love to use that but I bet Carly Simon and James Taylor would not appreciate it.