In this example, some commenters are joking around and placing angle brackets (less than, greater than) around their comment’s text. As a result, the comment text does not display.

It does display in a web browser or Voyager. Raccoon also does not render the comments, though strangely it does render that last comment in the chain. Perhaps it has something to do with the fact that the comment includes an apostrophe and comma, unlike the others.