Does it have to be acoustic?

Does folk music have to be acoustic? Is there such a thing as “electric-folk?” How do you feel about a crunching guitar in the middle of a traditional song? When Bob Dylan plugged in–he freaked a lot of people out. When bands like Clannad in Ireland started using electric guitars, people there were freaked out too. A recent search in Google for the definition of folk music brougt up seven different descriptions–not one mentioned the music being acoustic. So, how do you feel about an electric dulcimer?