Dealing with users is nothing compared to dealing with Linux distributions. The distribution will patch your code. You are powerless to stop this. They will ad

Dealing with users is nothing compared to dealing with Linux distributions. The distribution will patch your code. You are powerless to stop this. They will add bugs. They will add ill-conceived and/or incompatible features that the users will come to rely on. Fedora adds a -Z option, and Debian adds a -Z option, and SuSE does too, and all of them are in conflict with each other and with the purpose for which you had reserved the -Z option. Of course, the users will blame you.