I don't think that would apply to all forums here at LF. For some threads time just runs slower. Or other threads are active for quite a long time.
Plus, it's pretty easy to look at the last post's date to know how 'outdated' the thread is.
And last but not least, one can easily set a filter to have only threads listed which are not older then xx days, weeks, whatever. This can also be preset in the User CP's options section.
However, a (warning) message just for posting in a thread older than a month is a bit too much, I think.
Last edited by Ray G. Jones; 11-07-2005 at 06:14 AM.