No Map Claiming
You should never claim parts of public maps as your own for "you" or your pack/pride. The maps inside the game are meant for everyone and not only a certain user or user group, you need to share all the public locations with any user that you might bump into, as well as other users must respect the fact that there might be those roleplaying in the public chats and locations that exist. When it comes to downloadable private maps you are never allowed to claim any work(maps downloaded) as your own, this also goes for other creations such as items, meshes, markings etc. This could get you warned, kicked and in some cases banned from the game.
Altering Game Files
Do NOT alter any of the decrypted files or codes for the game that might affect the maps and/or gameplay. Giving your an advantage or not, the files should remain intact unless you are given a permission to change them. If you are caught doing this you will most likely face a longer ban.
Ok now I'm not doing this to pester or get myself banned I'm just doing it to try and understand a little further.
After reading the game rules those two above are the only two that state anything about maps. The only thing I see that comes relatively close is: "Giving your an advantage or not, the files should remain intact unless you are given a permission to change them."
It talks about an advantage but in alerting files None of Kovu's rules state that we cannot place Portals to FH maps in our Custom maps. Which is making me blatantly confused on what you and Skippy have been trying to pound into my head. I mean I'll take you're word for it but, still the rules state nothing.