Have not made mock bookings on O, yet I have saved cruises in my account, and never receive calls.
This happens to me when looking at a Viking cruise. If I start a mock booking, entering all personal info: Names, address, email etc., I receive tel call and email from any random V agent.
I ignore and don't respond to either, as I've used the same good V agent, who I'll call for more info. He never bothers me with follow up or pressure to book, just answers my questions .