Jill (commenting on Jim's status): OMG, you really did that this weekend?
Jill (commenting again before anyone else has commented): Pardon me for being a double-poster, but I so need to go there!

Janet (commenting on a forum thread): Guys are such dicks.
Janet (commenting again when no one else has posted in between): Did I mention we just broke up? Sorry to be a double-poster
: (

Jane (on Jill's status update): I can't stand Jack, he's so self-obsessed...and such a double-poster!