Follow up post
I write software in my spare time, and at work. It's what I do. To a degree, it's how I make a living. When my shutdown tool ShutOff 2000 was cracked, I didn't bother writing a new encryption algorithm. I realised that it would take only 20 minutes to crack it again, compared to the hours it would take to write. Sure, it's potential lost income, but the basic good of people paying me money to use it has (if you'll pardon the pun) paid off.