Friends,
I see posts here stating what copyright law permits and doesn't permit, but it seems to me that there is one fact about which members of the community are unaware, or are just not taking to account. The laws governing copyright vary widely from one jurisdiction to another, and what applies in one jurisdiction does not necessarily apply in another one. The duration of copyright, the particulars about what one can and cannot do, vary according to juridiction, and then there's the matter of determining what jurisdiction applies. If a member of the community who is under German jurisdiction creates something which is used by a member in the UK, which is uploaded to the DLS, which is operated by an Australian domiciled company, but is (or at least at one time was) hosted on a server in the US, whose copyright laws are applicable? Furthermore, the relevant part of the US code, seems to me to suggest (and here I should make the disclaimer that I am not an attorney in any area of the Law, nor in any jurisdiction, and that what I write here is not intended as legal advice, but merely an expression of my lay opinion) that in the US, copyright infringement actions have to be started by the owner of the copyright. This means that the contributions to Trainz content of a creator in the US who died without making appropriate transfer of his intellectual property are still technically under the copyright of the creator, but that there is no one who can start an action. And if the owner of the copyright is still living, but chooses not to enforce any copyrights he or she may hold, no one else may enforce them, either, at least not in the US. Further, in the US, while any author of content for Trainz has copyright protection on an item from the moment that item is reduced to "fixed form", if the author holding the copyright has not registered with the US copyright office, the copyright has been deemed (as I understand it) to be unenforceable.
It is not my intent here to comment on any of the opinions expressed in this, or similar threads on the subject of intellectual property, only to note that when this topic comes up we need to remember just how complex it is.
And to complicate matters further, as I understand the law, a script would constitute a computer program, and as such could be entitled to Patent protection in the US for a period of 17 years. And to complicate matters still further, for those of us in the US and familiar with the issues of the licensing from UP and CSX, these probably involve (besides any copyright considerations) the issue of Trademark / Servicemark Law, and thus involve still another set of considerations.
ns