You guys are making this way too tough...
All you have to do is light a fusee (road flair) and shove it in the
hole. Kick the dirt into the hole so the acrid smoke won't come out,
instead it will fill the tunnels and the moles will leave. If they
don't,,, they will die.
The sulfer smell is way too strong to exist. You may have to hit them
a few times before they quit coming back.
This works great!