I didnt have too much trouble with being disconnected for some time. But lately i got kicked several times in a row; might have been a day they had trouble with the server, but it might also have been a problem with another program i ran on my computer at the same time.
So i think the safest way to avoid d/c is to shut down all other progs when playing at fod or at least all other programs that open a permanent connenction to the internet (esp. messenger progs or automatically updated chatrooms etc.)