I'm much too lazy to look for it, but I believe that was part of Labatt Blue's "here's to friends" campaign in around 04-05. Each commercial focused on a specific type of buddy, I remember the "bad influence friend" one you're talking about. I remember because that one always reminded me of a buddy of mine at the time, always getting me in stupid, regretful situations with his dumb schemes.
Edit: Here-
http://www.rsafilms.com/company/rsa-...influence-1896