Word to the wise: threatening query letters on legal letterhead don't work. (Are you shocked? Didn't think so.)
Elizabeth Law got sued once by a writer who'd sent in an original illustrated dummy. She wrote a letter and sent it back that day and it returned home damaged. The author took her to small claims court.
Now they're talking about scary/gimmicky submissions:
- letter openers/small knives
- manuscripts in cupcake boxes (an unfair trick that led to dismay)
- dog biscuits
They remember the gimmick but not your MS. Don't do this!