...and only reopen if the OP requests it.
Posters are exhuming threads from ages ago and asking for updates, posting advice, etc. The recent one was from 2012!
I often look at dates now because I've been sucked into zombie threads many times in the past but sometimes I forget, especially if the thread hasn't got too many replies.
Can MN close zombie threads from say a year? There's nothing more to be said - let it go [in Elsa's voice].