This is post 2,843,204 - the vast majority of the entire history of FreeRepublic is in the same database. Databases on that scale under this load are, well, taxing to any system, and it is the weight that holds down the system on the present hardware. (I'm not a fan on solving problems through bigger hardware, but it works here.)
As for an e-mail vector to attack FreeRepublic, I'd doubt there is any chance of that happening. The server is in a data center, no one is at the terminal accessing e-mail, and even if they did, it is not a Windows type environment where a number of exploits would be possible (including ADS.)