I approve of most worm . Some have been excellent for bait when fishing. They don't necessarily only live on farms though - I have to question why that was stated as worms are not exclusive in their habitat.
I used to sit next to one at school, and my dog had them once or twice - and those parasites I am not so happy about.
I saw some earthworms or meal-worms get fried on morning telly, and that seemed very cruel to me.
They have five hearts, so I don't approve of such heartlessness .