You're so far the first person to bring up legality in a non-facetious manner.
I don't anyone seriously believes Fridge should lawyer up here- there'd be nothing to really fight for, as RA hasn't really benefited in any financial terms. The harshest thing anyone's called for would be suspending RA from Warlight.
If you create something, you have a right to it. Simple as that. Fridge put the effort into it- he owns it. As I've said before, even Fizzer's acknowledged as much:
https://www.warlight.net/Forum/99492-open-warlight-map-file
Edited 7/23/2015 03:54:31