[prdonahue]

Interesting. I've always known "sic" by it's canonical usage: to point out an error in someone else's quotation (perhaps with some sneer).

Wikipedia actually shows this newer usage of it. From https://en.wikipedia.org/wiki/Sic#.22Ironic_use.22_of_sic:

  "Ironic use" of sic[edit]
  Occasionally a writer places [sic] after his or her own words, to indicate that 
  the language has been chosen deliberately for special effect, especially where 
  the writer's ironic meaning may otherwise be unclear.[18] Bryan A. Garner dubbed 
  this use of sic "ironic", providing the following example from Fred Rodell's 1955 
  book Nine Men:[2]

  [I]n 1951, it was the blessing bestowed on Judge Harold Medina's prosecution 
  [sic] of the eleven so-called 'top native Communists,' which blessing meant 
  giving the Smith Act the judicial nod of constitutionality.