Here's a fine example of an old thread that I clicked in on(about the 20th one this evening).
http://www.rcuniverse.com/forum/gas-...e-engines.html
Thread started sometime in 2010, progressed a few times over the years and sat dormant for 5yrs, and recently (last few weeks) someone posted a response in that thread and by the looks of it probably never realized he was responding to a post over 5yrs old. That thread origin date would at least tell someone before they even open the thread when it was originally posted and give a heads up.
I'm done for the night wasting time opening old threads.