Lirion: If most plants are patented, I was not aware of it. I've never purchased a plant with any type of written statement preventing me from allowing it to naturally reproduce or artificially propigating it. Maybe I just didn't notice. You sound as if you have some experience or expertise in this area, so if what you are saying is that certain breeds/strains do possess such caveats, then I am fully willing to believe you. However, in that case it would be stealing to replicate these legally protected plants, in my opinion. How is this different from MP3s?
What I was saying is that the comparison of non-patented/non-copyrighted/self-replicating entities (i.e. the non-protected plants) to one which is patented/copyrighted/non-self-replicating seems to be a stretch. And just because the record companies and artists know that people can and will make copies of the music doesn't mean that it's okay to do it. Otherwise they wouldn't spend the not insubstantial time and money to copyright the material in the first place, and fight long court battles over it later. Granted, their motivations may be more to protect their profit margins (which I agree are inflated) than to protect the intellectual property of the artists, but none the less the copyright laws are (mostly) on their side.
I also still believe the comparison of software "piracy" to MP3 "copying" is a closer analogy.