Responding to msg by Jim Hart:

What about liability of non designers for failing to make changes? What about liability of people who use fallacious moralistic arguments and use coercion to stop changes? ................................................................. ..........

You don't really have a problem with that, do you? :>) There are no expectations placed on non-designers to come up with anything of any practical use to society, therefore they have no responsibility or liability, as no one takes them very seriously. People who put up blocks to progress and improvement (not merely 'changes' per se) are suffering from a sense of loss of control over their existence, and should be sent to a hospital to recuperate from their psychic wounds. (Actually, I think that this wouldn't become such a big problem if, for one thing, everyone had a clear understanding & appreciation of the concept of "property", what that constitutes, and what that means in terms of the liberty to affect things in the world around us.) Blanc