By this token, people who pretend to be worried about high grades at a good law school, by their pretense, may push others into a downward spiral. And, treating ridiculous concerns seriously if it's not a pretense, may push that person and others into downward spirals. Better to dismiss such ridiculous concerns, I would think, as ultimately being more reassuring than enabling the tale of pseudo-woe.
If you want to remain on the waitlist, you should send an e-mail to uottawa by tomorrow, as tomorrow is the deadline to respond.
An Admissions Officer confirmed with me that, since files have already been scored, the admissions committee will not be looking at anymore supplementary files, including new grades.