The 100 block rule does not allow players to claim within 100 blocks of each other without permission from the other player. To me that sounds relatively straightforward until you head in the Nether. Many players use the Nether to travel long distances in the Overworld and thus build highways all over the Nether to travel to places. A lot of players, myself included, claim those highways to prevent them from being griefed, which leads me to my point. Should the 100 block rule apply to the Nether highways? I can imagine several problems that would arise if the 100 block rule applied to the nether regardless of the circumstances. For example, suppose a player wants to build a highway via the Nether to connect two portals and decides to claim it, but in the process the player accidentally runs into another nether highway and has to cross it. What does the player do? Go around the highway? You can't exactly just go around a highway that most likely stretches for hundreds or even thousands of blocks in the Nether. What other option does the player have than cross the existing highway? You won't believe how much highways and paths there are in the Nether. I think there should be an exception to the 100 block rule for building nether highways. I imagine how such a system would work is if a mod is notified that a certain claim in the Nether is a Nether highway and thus exempt that claim from the 100 block rule. If a player tries to abuse that system to claim and build something that is not a nether highway then a mod can refuse to exempt that claim from the 100 block claim rule. I think it would certainly help players building highways in the Nether.