Guys thanks for the common sense replies.
The sheer hatred they express has got to have consequences, but in DU's case, it looks to be more self destructive.
Innerwebs reinforcement just doesn't provide the stimulus to cross the threshhold that IRL meet ups would. If we were hearing about DUmp meet-ups at high frequency, then I'd start being concerned about what the DUmmies will do.
OK, that makes sense, and it fits with what everyone else has to say. When DU people start crossing the line, we will see clear signs.
