I don't agree with your idea, Spot, for it is not practicable. Why? See a short preview to one of the threads with a no name Mudcat:

post N: I wish to say that I agree with the fourth last post before my own.

N+1: No that's obviously wrong.

N+2: Sorry, someone else has posted in between, make it the fifth last post I agree with.

N+3: I apologise for having said 'ashole' to you.

N+4: From which post on to you count back??

N+5: Do you apologise to me who has been called 'asshole' in the 27th post or to that big time asshole of post 14.

N+6: The lyrics are originally not from Ned Portland.

N+7: Sorry, I counted wrong, I meant to say 'post 15'.

N+8: Asshole

N+9: Who me?

N+10: Stop insulting me, idiot.

N+11 Do you mean me?

and so on...

Though I agree that often the name of the poster (or lack of) has a larger impact upon the reading of an argument than it should have.

Wolfgang