thats the benefit from a decentralized Pool like p2poll :-) nobody can hit it.



That's not accurate, it's just more difficult and would cost more time and resources to really DoS the whole P2Pool network. There are many more servers to DoS (DoS and DDoS tools don't know how to iterate through all P2Pool servers this would have to be done separately and distributing the attack on all nodes would have to be done manually). Many servers have weaker Internet connectivity and would be easy to DoS but them being DoSed wouldn't disrupt the rest of the network.

In case of an attack trying to disrupt P2Pool, it would probably be only effective in disrupting a handful of nodes and people with backups would probably not even notice it.