How to Hack a Coke Machine

One of Google's "How To..." of the day is "How to Hack a Coke Machine".
nice.
I think my favorite parts were the warnings:

• This may be illegal in some jurisdictions, and it will generally be frowned upon by store staff or machine service people, so exercise caution when trying it out, and be sure to follow any applicable laws in your jurisdiction.
• Don't do this if there's a line behind you.
• You might waste your time doing this, as Coca-Cola has distributed new firmware to their vendors that would render these instructions unusable