Well, it looks like IJJI has finally taken the job for "banning" people who are getting caught with mods. This is what IJJI had to say starting 2 weeks ago.
Post from GM_SF of IJJI:
Soldiers,
It has come to our attention that there are those who have been modifying their game files to customize their weapon skins. Although we normally encourage your creativity, please keep in mind that this goes against our Terms of Service and that we will be taking action on any players who have modified their weapon skins. If you have already modified your weapon skin, please delete that modified file and launch Soldier Front. Reactor should automatically update with the files that you deleted.
b) You may not modify, adapt, translate or create derivative works based upon any part of the ijji.com site, the Service, any associated game, or ijji.com code without express written permission from NHN USA, Inc.
If you refuse you believe me and think I'm just lying;