This is an example of an obvious idea - only it won't be obvious until people start using networked computers for some time and realize the need. Unfortunately

This is an example of an obvious idea - only it won't be obvious until people start using networked computers for some time and realize the need. Unfortunately we have a low bar for what is not obvious, e.g. when no one else has yet had the need for it. Being the first to do something should not give anyone the right to prevent others from doing it. Patents are a net cost to society, and software and business patents are teeing up to explode those costs. A large tax on the real economy this way comes, with the spoils largely to lawyers and financiers who produce nothing of real value.