router syn/syn-ack/ack alarming...

-->um... maybe i'm missing the clue here, but if the router vendors add
-->something that shuts down an interface if the SYN/SYN-ACK/ACK ratio
-->becomes too bad make it *easier* for me if i'm doing a denial of service
-->attack on a host?
-->instead of denying service to a given host, all i have to do is drive
-->the router into alarm mode so it shuts off the interface and then i get
-->to deny service to an entire segment and everything downstream from that
-->here's to better bang for your cracker-kiddie buck...

That could potentially take out a pop, as each interface goes down due to
an attack.