The courts don't generally consider that type of information as personal, and we certainly discourage people from using a DOB as a PIN number. DOBs are not considered personal, private, confidential pieces of information. Those are things that are available.
PIPEDA isn't about protecting information. It's about how we use it and disclose it. I know I applied for a credit card, and I now get a raft of stuff in the mail. Somebody is certainly disclosing that, but I trust that it's being disclosed in accordance with those guidelines.