longwood inc Matt how do they get around the do not call list??? phoenix, Arizona

I too just got the call about a 5th wheel I listed on Craigslist. thank God i searched here first. the day I posted my ad, I received an email that was asking questions about it, thru CL, and was asking for a phone number. (even though it was in the ad. clue #1) I have the email I responded to. next day, 'Matt' said in a phone message, he has interested parties for my 'vehicle'. (clue #2) Now it makes sense. I'm prepared to ignore their tactics, but what bothers me, is, how'd they get by the 'do not call list' ???????