Give the Giant Grubs a cooldown on respawning

[Thieverpedia]

These things have been in the game since the early beta, and they're still as cancerous as ever. They have high health, are annoying to kill, and can respawn the instant you kill them.

Monster Meat alone isn't enough to improve them, but a 2-3 day cooldown on their respawning after death would be. Please, Klei. I'm tired of having to deal with them again a few seconds after killing them.