I was noticing a lot of threads with zero replies. that takes a while to sift through if you're just wanting to read what people have to answer.
I thought it wouldn't be a bad idea to do this:
1) after so many days, remove the unanswered thread from the server. This saves hard-drive space and the readers time.
2) provide a way to filter the unanswered threads out.
I haven't seen option two but if it is available, I'd like to find out
that's just my .02 on how to make the site a tad better.