"I don't fill it out. Is it a requirement to do so?"
Sure is. CAR 1988 states:
5.52 What must be recorded in a personal log book?
(1) The holder of a flight crew licence, a special pilot licence or a
certificate of validation must record in his or her personal log book:
(a) the holder’s full name, address, date of birth and aviation
reference number; and
and
"An offence against subregulation (1) or (4) is an offence of strict
liability"
So, $550 fine if you got charged, although you could just write it in to avoid that..