Lesli, thats the main thing I was thinking about.
If its also attacking the remote machines, it will be using even more of the hosts bandwidth, this, plus the bandwidth used by the initial DDoS could cause HUGE fines for hosts.
It could cause really big network lag I think because of all the traffic going in both directions, just think of 200 machines attacking a server by DDoS, and then the server returning "fire".
What if you have 10 servers being attacked at the same time, on the same network
Not something I would want to experience