Aiko, the programs could be used for level debugging\testing\experimenting purposes (i.e. in single player levels), even if there are cheat codes you can type, they have their limits and it is way easier to click on a button to activate. I know that this makes cheating in multiplayer games easier but if the program is unusable, it won't be a hazard.

Take into account that he is not the only one who has made programs for cheating in JJ2. A lot of people before him have been hacking JJ2 (like mezz who made one of the first level depassworders and pennywise who made xjj2) or using memory searching\editing programs to cheat in multiplayer games (I can name names, if you wish).

Thirdly, who are we to tell him what to do? I agree completely that cheating is bad and will ruin the community but helping people cheat in JJ2 is not exactly Overlord's objectives. As Newspaz said, he made anti-cheating programs as well, which he could easily have chosen not to do. I think he just made the "cheating" programs to show what he can do to mature and responsible people who are not interested in cheating, but are interested in the inner workings of a program.

Also, I did follow how things developed. Even before he made this topic, his programs were already protected, and I think the people who have visited his webpage before this topic will know about that.