No but new duplicate threads bump current discussion threads off the main page making it a PITA to continue a discussion.

You then have to do what the offender should have done in the first place and search for a thread that was just up.... and then that's where all the fun starts.

If there are duplicate subject threads you then have to sift through them all to find the post you wanted to comment on. By that time you find it you may forget what your own dang point was and end up not posting. Reduced posts = a less valuable forum. Many duplicate threads = a PITA to use.

...end of rant.