WASPA: What's a "Do Not Contact" list?

The "Wireless Application Service Providers' Association" (WASPA) are a strange bunch. On the one hand they deal with complaints about their members, but on the other hand they don't have a central "Do Not Contact" database.
Many of their members don't seem to know what a "Do Not Contact" database is. Never mind the ECT Act or the newer Consumer Protection Act, which allows customers to specify whether they want to receive marketing communications from a given company. See Chapter 2.B.11.1 of the Consumer Protection Act. In particular, I have the right "... to pre-emptively block ..." approaches from a marketer.
So after my incident with the Morvec scam, I decided to write to all members of WASPA asking them to make sure that my number is added to their "Do Not Contact" list. Four of the email addresses supplied in the Full Member database don't work. About half of the respondents added my number to their list. The rest are just confused. Many denied that they were invoicing me anything, without adding me to their DNC list. Some are confused as to what a DNC list is. I have had to send 8 requests to the list of 89 email addresses repeating my request to be added to their DNC list. Why don't they just use the DMA's list, flawed as it is?