Currently it's quite easy to open the ADOM executable up in a text editor and read much of the in-game text, revealing or half-revealing many mysteries from the game. Some clever chaps can go further and use (or create) some very clever tools to get access to more data, and more easily. There are a couple of problems with this:

1. It ruins the mystery of the game when secrets get out from simple file analysis. Once a secret's out it's hard to ignore.
2. It makes it difficult to differentiate on the forums between spoilers and super spoilers.
3. Sometimes information gleaned in this way is misleading or inaccurate, leading to false assumptions that make themselves into wikis and guidebooks. Generally experienced players can distinguish between the facts and the assumptions, but for newer players this is a serious trap as they are the ones most likely to read and believe the guides ("improved" or not). There are many examples of mistakes from this already.

Now, assuming it's believed that this is a problem (some will surely object) it would be nice if it could be prevented, by somehow obscuring the text in the executable. I have no idea how that could be done, but if there is some special compiler trick that could be brought to fore then that would be handy.

This won't fully stop the memory address readers and such, but it at least makes things a little harder, and pushes such secrets from the hands of the many to an educated few who might be more sensible about interpreting and spreading their discoveries.