If I recall correctly, this is part of where the knowledge and skills for writing virus programs came from - the programmers became very skilled in concealing their programs, modifying other pieces of code, etc.
Really too bad that some of them decided to use their knowledge that way. Not to say that all (or even most) virus writers had that kind of background, or that playing that game was a bad thing - it really sounds like tremendous fun. :)
You have moved into a dark place.
It is pitch black. You are likely to be eaten by a grue.