Its been a very long time since one of my character's has run across a good ol' fashioned rot grub. It seemed to me that back in the 1st edition days, rot grubs were always a concern.
Listen to an old rotted door? nope, could be rot grubs.
Search a decaying body for loot? are you kidding? could be rot grubs.
Rummage through a pile a old clothes? Hell no! R-O-T G-R-U-B-S!!