Until such time as your handwriting gets better -- i.e., less distinctive -- you may want to reconsider sending nasty anonymous letters to people through your elementary school's inter-class mail system. Catharsis be damned -- it will come back to haunt you in the end. It took Ms. K all of about, what, 3 seconds to recognize your unique (i.e., half -legible) scrawl?
As lovely a woman as your principal is, and as much as I usually enjoy talking to her, both she and I have much better things to do than sit around and speculate just why you are turning into a delinquent.
Your mother, the ex-lawyer, who takes a really dim view of crap like this.