(I’ll address your response later after David, RationalBiker, Freestyle… respond.)
I will give you the basic response, and in order for this exchange to be of any value, you have to understand these points and either accept them and integrate them into your thinking, or else reject them and give reasons to reject them. And of course you know that it would be wrong to reject these points.
First, the concept “property” implies that the owner has the exclusive right to dispose of it. That entails that if you want to use someone else’s property, you must get their permission. You have no right to another man’s property if you do not have their permission.
Second, the burden is on you to obtain that permission. The permission must exist. You cannot use another person’s property under the assumption that permission always and automatically exists. You cannot take another man’s car on the grounds that you assume there is automatic permission. The burden is on you, the non-owner, to obtain permission, and it is not on the owner, to deny permission. In a rights-respecting property, a property owner need not actively prohibit others from using his property. Ownership of property does not entail an obligation to deny the right to use the property.
From this it follows that you do not have a right to copy IP, unless you have actual permission. When you receive actual permission, you may rightly copy the IP. The fact that you receive actual permission from one owner does not create an exception to the property rights of other owners, and you cannot conclude “Because I received permission to copy the IP of one man, I now have the right to copy the IP of all men”. Permission to use can only be granted by the owner of the particular property; permission is not a communicable disease.
In the specific context of IP-copying, there are two fundamental facts which you must recognize in making a decision to copy or not (on the assumption that you are only engaging in moral copying, which means copying with permission). The first is that software does come with a EULA which you must read and agree to, and the terms of the agreement include the permission to copy. Furthermore, you can grasp why it is in the nature of the product that you must be allowed to copy the product – it is because the product simply cannot function if it is not copied. And finally, if you actually read these agreements, you will observe that sometimes the permission to install on multiple machines is granted, and sometimes it is not granted. From this you learn that there cannot possibly be any automatic, default assumption about the right to install multiple copies of software.
You must also grasp the fact that when you buy a music CD, there is no EULA, there is no statement that you have permission to copy the music in any way. Furthermore, such permission cannot be reasonably inferred from the nature of a music CD – it is trivially easy to use a music CD for its intended purpose, by putting it in a CD player and listening to it. Copying is never necessary for you to use your music CD. Therefore, there is no basis in reality for concluding that you ever have permission to copy a music CD.
Such a conclusion cannot be supported by pointing to software. The broad concept IP is differentiated into at least two genera, music and software. The facts of software IP are different from the facts of music IP, and no facts of reality indicate that a conclusion about software IP also holds of music IP.
Finally, the frequent assertion by music IP-owners that they assert their rights is sufficient reason to conclude that the IP-owners have not relaxed or abandoned their claim on their property.