Of course worms are not natural. But I don't think zappers are the cure either. They might keep them at bay, but I want them gone, totally.
Actually, I have put quite alot of thought into the use of a zapper. Wondered if I should, wondered if it would be what finally got these things once and for all for me. But then, I remember that I have never took drugs or zapped. I have basically no scattering, and I have a full blown, deep seeded roundworm infection.
I have read many accounts of those with worms that believe the use of a zapper produced their scattering. It's just a personal preference for me, not to take the chance. I just stated my opinion, but also acknowledge that some say it helps, and don't go around trying to steer people from them based on my opinion, or putting people down for using them.