Casper The Unfriendly Ghost

Don't believe that Casper is a friendly ghost because it's not true.
He murdered my entire family and he might kill you.
Please don't believe that Casper is friendly and soft.
When my wife least expected it, he bit her head off.
He drowned my twin sons while they were taking a bath.
You'd better sleep with one eye open or you'll suffer his wrath.
Casper went to the White House and ate Trump.
Then he flew over Barack Obama and took a dump.
Obama didn't like being soiled by Trump's remains.
Casper isn't friendly, in fact, he's actually insane.
When people see his fangs, they either run or faint.
Casper is so mean that he makes Attila the Hun look like a saint.
If you ever see him, I'll tell you what you must do.
You'd better run like hell or Casper will devour you.