Why do you assume there has to be a law or legal pressure? Lots of industries adopt practices like this to _avoid_ a situation where something will become a ma

Why do you assume there has to be a law or legal pressure? Lots of industries adopt practices like this to _avoid_ a situation where something will become a matter of law, because it has little or no impact on the sales of their products. If you're a color laser printer manufacturer, agreeing to do this is probably a lot better than maybe having the government regulate sales of your product or otherwise add red tape.