How can I warn people of a scam on the internet?

Marilyn Smith: How can I warn people of a scam on the internet?
I know of a company I want to warn people about. How do I go about it? They are a scam company and I found them on Caigs list and need to warn people about them.

Answers and Views:

Answer by Watch IT!
Call Microsoft. They are in WAshington

Answer by Sharon T
Look for a way to report this at Craigslist.com.

Answer by STEVEN F
Don’t bother. Anyone that needs to be warned won’t believe you.