Try to explain to a judge you had no criminel intent to mark with a pen Legal Tender documents knowingly you were making them unfit to circulation. I am sure you are going to be found guilty.
That's the key; "unfit for circulation." Go back to the first post in this thread, and click the link to the article I wrote that quotes the Bank of Canada's opinion on what is "unfit for circulation." Marking notes with a pen or rubber stamp the way note trackers do does not render the notes "unfit for circulation" according to the Bank of Canada's own criteria.
If someone here thinks it's legal to write on paper money. Just buy a whole brick of 10$ write and sign your name and write your telephone numbers, wait one or two months until the banks receive your bills and BoC gets contact. Wait two weeks until RCMP knocked at your door and wait your process.
Been there, done that. Over three bricks of notes over three years, to be precise. No, they were not marked with my name and phone number, but any law enforcement official could easily trace my bill entries right down to my postal code and IP address, and if it were a serious enough concern, they'd have let me (or at least the site's operator) know by now. 1.2 million bank notes have been entered on Where's Willy up to this point, and the site operator has heard nary a peep from any law enforcement officials.
Anyhow, here's what Sylvie Dionne of the Bank of Canada has to say on such matters, and I'm sure that they consult their lawyers before making such a statement:
"At one time, the Bank Act contained a section that prohibited the mutilation and defacement of bank notes. Section 311 of the Bank Act was repealed in 1993. It was not added to the current version of the Bank Act nor was it added to any other legislation. It is therefore no longer an offence to deface or mutilate paper money."
Right out of the horse's mouth; and that's even assuming that marking a note with a pen or rubber stamp is "defacement or mutilation", which it isn't anyway.
Can we please stop beating this dead horse now?