Well - protect your lines all you want (I protect mine) however if a lightning will strike nearby there is always a chance that your electronic equipment circuits will fry from the induced current, completely randomly. The only protection would be cryo cooled super conductive shields, but those are not practical at home. Oh, and by the way - I heard that those who make protectors don't usually pay the damages, the best bet is a home insurance policy, and than lightnings are god send (lol) cause they replace with a now current equipment.