that isn't good actually. you should be able to put something in place to stop that.
...
Already done
Never nice to be "attacked", as I believe we were, almost certainly.
We get quite a few spambots [mostly from Asia] hitting our forum and consuming our bandwidth, but the moderators keep on top of it. In the case in question we were hit via multiple proxies throughout Europe & Asia using preconfigured links to various sub-boards within a 20 minute window. That's what hit us so unexpectedly and so heavily, but we caught and stifled it
Oh, the price of popularity