I remember some weeks ago when some contributors on the forum suggested that people who were "caught" by scammers were not of the highest intelligence. Furthermore, some of these posters suggested the bank/financial-institution should not reimburse them. OK! there are grounds for such thoughts but don't think you cannot be scammed. The scammers can have advanced techniques intended to absorb as much information from their victim without even the victim having no knowledge of the fact.
Most people contributing here probably are involved in selling something, products, services, advice, insurance, etc. The astute business will have their employees do several Sales Techniques seminars. These seminars provide perfectly legal ways of selling especially to those selling over the phone. Most of us in sales (in my case formerly in sales) know how easy it is to present a service or product and nurture the possibility of a sale with identifying the need etc. Most of us can carry a conversation with the "customer" and passively convince him/her the need to buy from us and the next step is merely to close the sale and likely collect the commission from our "work" . . . sorry "sales techniques."
The scammers just bring the method a step further whether they are at your door or on your telephone. By the time the white van has done its three point turn (in the case of the flowers above) your account is hit. The telephone scammer probably works even faster.
So you thought you'd never be "caught out" - Think again. Some of these scammers are excellent at what they do and most of them aren't even in the country.