Newbies so often start threads and then abandon their account when conversations do not go their way. Then other newbies come along and reply to the OP that hasn't been online for weeks.
It would be nice to have a notice near the name if the user has not logged in a while. i.e: (Inactive for 6 days). Could just be for newbies, or for every topic starter.
The warning "This post is xx days old!" does not address this issue.
This is an interesting observation/suggestion being made and i support for that, it will help keep on a track on each of the thread in situations whereby the Op to such thread isn't active anymore or has already been given the required and necessary response needed from the thread, instead of other members spamming up and posting, it could either be locked or notified on any user to that it has been a while since the last active day of the OP, i think something similar to this has already been existing in the situation whereby when you want to make post on old threads, you will receive information warning it been a while since last reply has been made to that thread.