I'm sure that's exactly what happened during that fiasco started by the Bostonian Idiot, about the presumed indictment of Karl Rove.
There was a sudden increase in registered members, an odd quirk, during that time. Since then, the "growth" of DUmmieland has demonstrated nothing unusual.
A lot of those new members posted three or four comments, and have not been back since, even though they weren't mausoleumed.
As for the number of "real" DUmmies, I stick by the numbers computed by the honorable Ralph Wiggum on the other conservative web-site; he did some rather exhaustive and comprehensive digging last year, and came up with circa 3,000 authentic DUmmies, the rest being trolls and moles and those now six feet under.
For some reason, I stick with 3,750 (+/- a few), but either number seems realistic.
Who is Fat Che?