You can't really cheat unless there are rules. As for not feeling guilty, maybe you should give something back to the community? Work on an open-source project

You can't really cheat unless there are rules. As for not feeling guilty, maybe you should give something back to the community? Work on an open-source project or something, maybe? Or maybe you can put it on the same level as something you're happy with. Like working with other programmers in your company, whose code you could probably write.