Some interesting (?!) cases:
Bad Examples
www.macworld.co.uk "We care about your privacy" requires about 250 mouse clicks to remove all "Vendor Consents" (whatever that means). No way to remove all consents with one action. This doesn't sound like caring to me -- more like "We'll make opting out so hard you'll give up".
Good Examples
www.staples.co.uk: Smooth as silk opt-out process. Addresses possible multiple registration using different email addresses.
