SFE Energy - scam?

Someone from SFE Energy just knocked on my door claiming to be checking energy bills on behalf of Duquesne Light and Peoples Natural Gas. I happened to notice that they had some kind of service agreement form in the folder they were carrying. SFE Energy is, to my knowledge, not in any way affiliated with Duquesne Light or Peoples. I already have a third-party electricity supplier, and what this person was telling me didn't gibe with the actual, legal process for switching suppliers. I can only assume that this is some kind of scam - at best, it's very misleading marketing. Be careful out there, and do your research properly before you sign any forms.