Just don't do what my father did... We had a serious mole problem one summer, and nothing seemed to work - traps, gas, water, didn't faze them at all. Anyway, Dad got all hot and frustrated one night, and determined that he was going to fix this @#$%& mole once and for all. The next thing we knew, the rest of the family were bounced out of their beds at 5 the next morning by a thunderous BOOM!!! Dad had gotten up early, gone outside with his single-shot 12ga. shotgun, and waited until he saw earth moving at one of the mole burrows... and then let fly.
An hour or two later, after the police had left and the neighbors no longer feared World War 3 was breaking out in their backyard, Mom finally forgave Dad, after he'd made her breakfast in bed to help her recover!