I started a permanent loblaws boycott this week. Won't be shopping at any of the other big names either. Preparing to participate in the boycott led me to sign up for a co op that I should've been using all along and I don't see myself ever going back. Anything they don't carry I can get at a local independent grocer and they're usually a little cheaper than no frills anyway.
Co ops are a solution to corporate greed, use them whenever possible.