I hope Percy does not include hard posting limits as a method of addressing dog piling. For one thing, even in the absence of dog piling, we want the OP to be able to post responses. In some cases posting limits would make threads drag out. We may also want one leading responder to be able to do most of the responding.
I doubt there is a way to automate dog pile prevention.
If it is decided that posting limits are needed, perhaps per thread per day limits would be better.
On a related note, I would like to see evolution side members be more liberal on giving other evolution side members "1" message ratings for such things as trite messages, redundant replies, and in general, piling on.
If we are supposed to take our ratings seriously, I'd like to see evolution and creationist members not give out "1" ratings based on their lack of agreement with the message content.