Here's a tip, for Aussies: If you purchase something online, and immediately start getting spammed with marketing messages, fight back by POINTING OUT that they are IN VIOLATION of the SPAM Act of 2003, and send them this link: https://www.acma.gov.au/avoid-sending-spam (or you could send them a link to the actual Act - https://www.legislation.gov.au/C2004A01214/latest/text - but they wouldn't bother reading it)
Putting my money where my mouth is. The same company sent me marketing spam again. Oh look! The ACMA has a spam complaint form. https://www.acma.gov.au/spam-complaint-form Form has been filled out, with an uploaded copy of the offending email.
Interesting quote from the ACMA website: "For example, if someone has subscribed to a service, has an account or is a member, and the marketing is directly relevant to the relationship – such as a person’s savings bank telling them about another savings account with higher interest. It would not cover the bank trying to sell them insurance products.
It does not cover sending messages after someone has just bought something from your business."
This makes it clear that it is NOT okay to send random marketing emails to someone who has just bought something from you.
To add insult to injury, the particular online business which has sparked my current bout of rage, had one of those tick boxes on their form, as part of the check-out process, "Do you want to be added to our mailing list?" -- which is something I ALWAYS turn OFF. So they ALREADY had my EXPLICIT NON-CONSENT to being sent marketing emails.
And yet they immediately started sending me marketing emails.