Sure but by now every rational and reasonable reader must understand that whenever they come across the word "inflammable", the author might have misused it and

Sure but by now every rational and reasonable reader must understand that whenever they come across the word "inflammable", the author might have misused it and they need to search for additional signals to identify whether it means "inflammable" or "uninflammable". This is not different than how the rational and reasonable reader treats the use of an autoantonym.