Followup: Ten edits from this IP (to date) include seven that were quickly reverted by other editors as worthless. Five of those seven (plus one more constructive edit) relate to emergency medicine, and four of the five are bad jokes/deletable nonsense involving Dunkin' Donuts, dating back more than a year (to edits of Paramedic on 30 March 2007). The difference between running gag and repeat vandalism is subtle, but nonetheless real: It's comedy shows that have running gags, whereas freely-editable encyclopedias have repeat vandalism. If we have any more trouble with this, I believe the evidence would get us an edit ban.