- Repetitive nuisance calls. Constant call center background chatter.
- Suspect - information data mining calls.
- Although they fully expect you to provide them with information, they themselves refuse to identify themselves or the company -they- are representing.
- Too, if you can get them to stay on the phone long enough, it becomes very apparent that they are unfamiliar with terms like: "Not listed in my directory", and "You have the wrong number"