a troll anchor is something that is inserted into a document to purposely attract attention to it. The writer may add a sentence or image to distract the reader into asking "WTF is this?".
After this occurs, the troll anchor was successful. You where trolling your audience to make sure they where indeed paying attention.
Them: I read the document you send me, but then I saw "bada big bada boom coat that stuff right up", what is that about?
Me: Oh, that is my troll anchor, making sure people are reading the document.
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