A simple mod that makes rails no longer considered to be built by a player, causing biters to completely ignore them. Intended to be used with RSO and Misanthrope, so that rail maintenance isn't a chore with the increased biter aggression.
Biters will chase after trains that go past, and will still attack signals and stations. Only rail pieces are ignored.
Biters will expand their territory next to rails, as if they didn't exist. As such, long stretches of rails could find biter nests right next to them!
Should work with all mod-added rails or mods that interact with rails. It goes over all added entities that are either "curved-rail" or "straight-rail" and removes the "player-creation" flag, whilst preserving all other flags (such as 8-way-rotation).
Should be multi-player compatible, though I haven't tested. Can't imagine how it would cause a desync.
Details:
Factorio Version: 0.12
Released: Match 18th 2016
License: CC0 1.0
Pics:

Download:
https://dl.dropboxusercontent.com/u/132 ... _0.1.0.zip