Not all spammers are bad people,  some just don't know any better.  Before you get someone banned who could have been your ticket to millions, be a little patient and try this first:

Before you report it, try to turn it into your favor.  There are many good people out there who just don't know any better... and the last thing you want to do is report someone that could have been huge in your organization.

Take the time to educate someone, and you could win a friend who will help you make a boat load of money!

Here's what I do...

When I get spam, I simply reply to the message with:

*****

Hi NAME,

Thanks for the information!  How are things going for you?

Rex

*****

Usually I can get them to engage in conversation, and then through the course of the conversation I can ask "Did you see the NO SPAM notice Jim posted on our home pages?  Pretty strict..."

That usually gets them asking questions like "How do I know what's spam and what's not..."

And then you can educate, perhaps win a friend and get a sign up in your business!

If they persisit and won't stop, just report them through the help desk.

Hope this helps!

Rex