Why they just can't have it stay where it is like e-mail is beyond me. You do find the odd e-mail that says "Re: Fwd: Re: (Fwd) My Resume" but that's not typical.
One "Re:" is enough, isn't it?
Comment on Re: Re: Re: Re: Re: Re: Re: Re: Re: Re: Re: Re: "Re:" getting out of hand.
Back when I was using Windows, I used TheBat! for reading mail, and one of its favourite attention-to-detail features of mine was how it would set the subject to something like Re[2]:. I think the people who use Newest Nodes or a script that reads its ticker to browse the monastery (that includes me) find the information the Re: nesting provides quite useful.