That's a little excessive. The janitor was told that they were a legitimate marketing org, and it's completely unreasonable to expect them to investigate enough to find otherwise.
Presumably, you work for a company that sells stuff. How familiar are you with your sales department and everything they do? Are you willing to go to jail if you're wrong?
I'm very familiar with their sales tactics and they are legal. They don't commit felonies on every single call. If I knowingly found out they were commiting crimes and did nothing I am guilty.