D'oh! I only got the reference now.
But, as far as being an Easter Egg is concerned, shouldn't ZU.13 actually be a code gate and something else be a decoder? They don't have to be mechanically linked so they only work well with each other (that would make them too limited for play), but as far as flavor is concerned, they could be the product of the same programmer.
You call it 'thievery'. I call it 'social justice'.
- Vandalism found in compromised server