Here's a fun case to read if you have nothing better to do this morning:
http://www.canlii.org/en/ab/abpc/doc...03abpc100.html
It's an Alberta Provincial Court decision from 2003. The accused was being questioned by a CPS officer with respect to a possible jaywalking violation. The accused refused to provide his name and was charged with obstruction under the Criminal Code. The case talks about the elements of the charge of obstruction and deals a bit with the obligation to identify oneself to a police officer.