I don't know that I can say that they are a complete bust. Back before they came in, it was far more out of hand. I was getting upwards of twenty spam calls a night on average and some nights it was over fifty. Then Colorado No Call came in (several months ahead of the Federal No Call list) and that dropped almost immediately to a handful of calls a week. It dropped even further when the federal program came in. The problem was that both programs made big promises about the penalties that spammers would face, but never actually did much in the way of pursuing them and enforcing them, so over time, the spammers realized that they were paper tigers and, now, largely ignore it. But legitimate telemarketers generally do honor it. I get almost no calls for well-established businesses, whereas before that was a significant fraction of the calls. So, without these lists, the situation would be even worse.Also, apparently, the Federal "Do Not Call" list and sanctions against illegal callers have been a complete bust. We also get a lot of paper junk bulk mailings and my email account is daily about half spam and scam mail. I highly recommend NEVER responding to any Facebook advertisements as most are scams.