Accusations like that are not unnecessary. As a free software developer and a linux professional, I've seen similar type things occur when KDE released, when Debian introduced KDE, and the list goes on and on and on. I've personally run a server when something has "drawn the ire" of the nerd community (Of which I am one) , and I've read Slashdot as the 4e has come out and I can clearly see some upset people. Now I don't have Wizards logs, but I know for a FACT that the DDoS is often used as a weapon when technically oriented geeks (and I _AM_ a geek/nerd) get angry. I've seen what it does to servers, and I've seen what it's done to bandwidth costs.
EDIT: And might I add, the Gleemax servers that the forum is hosted on are all running RedHat Linux