Should there be a "zombie thread" time limit?

[FXMastermind]

@C_K_Dexter_Haven

Hazle, in the list of sins and malfeasance’s, reviving an old thread (“zombie-ism”) isn’t high on the list. In some situations, as you suggest, it’s perfectly fine. It’s almost NEVER OK in the BBQ Pit, for instance, since it’s usually just picking at old scabs.

I want to know the amount of time that has passed before a thread is considered “old”. On another forum the software auto alerts you if a thread is over 120 days with out a post, and suggests starting a new thread.

What’s the rule here?