This is actually my plan. While I won't write about the NGO, I have a scandal in mind to write about and put my name on the letter. I want the letter to sound innocent, but state that their actions have stumbled me or caused some questioning and see what happens. If it gets forwarded to my boe and gets blown out of proportion, I plan on recording all the meetings with them and maybe using them to show my family the ridiculousness of the org.
From other peoples' experiences, it seems that the letters either go unanswered or get forwarded to the boe. Once it makes it to the boe, it can get ugly.