To be fair to Ideal, I know from experience how difficult it is to stop a third party agency once they have the customers details. Remember they have their fingers in many pies.
Even if a manufacturer insisted they didn't contact the consumer on their behalf, chances are the agency would use the details anyway to sell something else.
How many times have you cancelled communications or changed address to find you get junk mailed at both properties?
i don't think thats fair to ideal or anyone else Tibbot.
Quite simply, if they can't control the data then they shouldn't be entrusted with it.