I'll PM a copy of this entire post to OzTrans and Yexo, but if either or both of them don't listen I will post a condemnation of the work ethic of those that were uncooperative in the relevant topics and never again use any of their GRFs.
Have a nice day.
And please don't let the screen door slam on your way out.
*closes door gently*
It's frustrating to me as well. That said, 1) Set authors are under no demand that they have to work with each other, 2) there's no expectation that all sets must cooperate with each other, and 3) there's nothing wrong with an author expecting that only their set be used, or used in a certain manner.
If one doesn't like it, feel free not to use those authors' works, or go make your own. There's plenty of latitude here for both. I may not be able to make people play nice, but I'm not without options.
I've PMed them both, using less harsh wording than I did here. Still, this just bugs me, so I felt the need to step in. I apologize for any disruptions.