There is a lot of misinformation in your post but that is your purpose.
A cold call ignoring DNC rules spoofing phone numbers is absolutely illegal. Despite what you say, spammers, or even legit companies, aren't using hundreds or thousands of legit local numbers so that their customers across the country "can call back without having long-distance charges". That is ridiculous. A legit company will have a toll-free number. I will agree with you on one thing and that is there are many good companies that call and help with issues. However, cold calling exit companies are not going to be on of those "good companies". It is odd that you searched TUG for a thread on Property Council Education, a company that doesn't even have a phone number, let alone a website. Nothing legit about them.
Your reason you got out saying "because non-owners were using the resort easier and cheaper than I was able to" is exactly the scare tactics the scammers use. Desperate people who are free from a timeshare want nothing to do with timeshares after that and they definitely do not go looking for forum threads to post glowing reviews about a company who just took thousands of dollars from them. People who do that are employees of the company creating fake profiles to try and fool future victims.
From the FTC website:
When is spoofing illegal? Under the Truth in Caller ID Act, FCC rules prohibit anyone from transmitting misleading or inaccurate caller ID information with the intent to defraud, cause harm or wrongly obtain anything of value. Anyone who is illegally spoofing can face penalties of up to $10,000 for each violation.