Edit: I used Godaddy, didn't pay for privacy. No calls today so far today (10am east coast).
Edit 2: Just talked to a coworker, it happened to his son recently and he registered at register.com. I think that supports my theory.
Two weeks ago I got a call on my personal cell from someone wanting to know if I was still interested in buying the domain.
Don't use your real address or phone number.
This is terrible advice that could possibly result in you losing your domain, from the Registrar trying to contact you on your fake address or phone, and deciding to suspend / delete your domain per ICANN Agreements / Rules.
> 2013 Registrar Accreditation Agreement (RAA) – The Whois Accuracy Program Specification of the 2013 Registrar Accreditation Agreement (RAA) requires registrars to validate and verify certain Whois data fields, which may include contacting you by phone, email or postal mail.
> Registrars must suspend or delete domain names that are not timely verified.
If you don't pay your info is public.
What did you expect?
We're used to the abuses of marketing departments, but we shouldn't.
I did follow up to see what “expert” meant and I was not surprised to find a site that looked like early 2000s.