Officeworks can/will send you SMS messages regarding post-sale feedback. More spam we could do without. There was no opt-in and I can't seem to avoid this spam if I use their service.
To be clear - I'm less interested in an opt-out. I expect to see an opt-in. A crappy "opt-out" baked into the same spam message is still spam, expect more negative reviews from people that take offence to corporate spam like this.