Hello. I am currently testing out your mod, and when i pressed the visibility toggle for the signs, i started getting null reference error spam.
This is because you don't have null handling, witch is needed for RimThreaded compatibility.

Here is our wiki page on with info about thread safe coding:
https://github.com/cseelhoff/RimThreaded/wiki/For-Devs#null-handling

Please consider adding null handling, its very simple to do, thank you.

-RimThreaded team <3

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Root level exception in OnGUI(): System.NullReferenceException: Object reference not set to an instance of an object
at Dark.Signs.DoPlaySettingsGlobalControls_ShowCommentToggle.RefreshAllSigns () [0x00000] in <2e70e6f2c98449859b83063c978d5672>:0
at Dark.Signs.DoPlaySettingsGlobalControls_ShowCommentToggle.Postfix (Verse.WidgetRow row, System.Boolean worldView) [0x00043] in <2e70e6f2c98449859b83063c978d5672>:0
at (wrapper dynamic-method) RimWorld.PlaySettings.RimWorld.PlaySettings.DoPlaySettingsGlobalControls_Patch5(RimWorld.PlaySettings,Verse.WidgetRow,bool)
at RimWorld.GlobalControlsUtility.DoPlaySettings (Verse.WidgetRow rowVisibility, System.Boolean worldView, System.Single& curBaseY) [0x0002b] in <b64badbf3c3d41018b3ca5d3e8c77771>:0
at RimWorld.GlobalControls.GlobalControlsOnGUI () [0x0005e] in <b64badbf3c3d41018b3ca5d3e8c77771>:0
at (wrapper dynamic-method) RimWorld.MapInterface.RimWorld.MapInterface.MapInterfaceOnGUI_BeforeMainTabs_Patch1(RimWorld.MapInterface)
at RimWorld.UIRoot_Play.UIRootOnGUI () [0x0001f] in <b64badbf3c3d41018b3ca5d3e8c77771>:0
at (wrapper dynamic-method) Verse.Root.Verse.Root.OnGUI_Patch1(Verse.Root)
UnityEngine.StackTraceUtility:ExtractStackTrace ()
(wrapper dynamic-method) Verse.Log:Verse.Log.Error_Patch1 (string)
(wrapper dynamic-method) Verse.Root:Verse.Root.OnGUI_Patch1 (Verse.Root)