User blog comment:Dekagamer7X9/I finally have a wordbubble/@comment-4902297-20151130081723/@comment-4902297-20151130151852

It's possible, yes, but not required. And while most senior users will put a timestamp/signature in, I've noticed that even some of the biggest editors here fail to put a timestamp in (which is neccesary for determining the time/validity of a message). The problem with the Wordbubble is that it's too easy to forget the signature when writing the message. This was brought up before, but the discussion never got too far.