Did you add the [Barf] part or was that a part of the article?
It’s so hard to tell with the horrible level of writing these days.
The use of square brackets indicates an insertion by someone other than the author of the quote (such as by an editor or Freeper). Here's a link on this usage...Inserting or Altering Words in a Direct Quotation.
IIRC, I have seen some folks add "-ed" inside the brackets to indicate the comment was made by an editor.