@EventHandler
    public void preInit(FMLPreInitializationEvent event) {
        boolean DRM = false;
        if (Loader.isModLoaded("gregtech_addon")) {
            DRM = true;
        }
        if (Loader.isModLoaded("BuildCraft")) {
            DRM = true;
        }
        if (Loader.isModLoaded("TwilightForest")) {
            DRM = true;
        }
        if (Loader.isModLoaded("RotaryCraft")) {
            DRM = true;
        }
        if (Loader.isModLoaded("Forestry")) {
            DRM = true;
        }
        if (Loader.isModLoaded("MineFactoryReloaded")) {
            DRM = true;
        }
        if (Loader.isModLoaded("ReactorCraft")) {
            DRM = true;
        }
        if (Loader.isModLoaded("Railcraft")) {
            DRM = true;
        }
        if (Loader.isModLoaded("DyeTrees")) {
            DRM = true;
        }
        if (Loader.isModLoaded("GeoStrata")) {
            DRM = true;
        }
        if (Loader.isModLoaded("CaveControl")) {
            DRM = true;
        }
        if (Loader.isModLoaded("EnderForest")) {
            DRM = true;
        }
        if (Loader.isModLoaded("ExpandedRedstone")) {
            DRM = true;
        }
        if (Loader.isModLoaded("ComputerCraft")) {
            DRM = true;
        }
        if (Loader.isModLoaded("MeteorCraft")) {
            DRM = true;
        }
        if (Loader.isModLoaded("ElectriCraft")) {
            DRM = true;
        }
        if (DRM) {
            System.out.println("You have some mods with DRM, you must remove these to continue");
            System.exit(0);
        }
    }