Thinking back to the 1990s we had a scammer in the library.
It started simply. Five people made appointments in the library for 3 pm. They all arrived on time and one man seemed to be in charge. We thought it was just a group of students who wanted to do some research together. That wasn't unusual. When they left, they made the same appointment for the next week. Again, that wasn't unusual
When the group met the following week, the man who seemed to be in charge was ordering library staffers to bring a large number of books to the table. Many of the books were of the 'fringe' sort and what he was saying sounded a little 'off' to us. We had suspicions but couldn't really do anything until we got THE PHONE CALL.
Ms. Y called us to say that she was not feeling well and would not be attending Professor X's Class that day.
What class? There were no classes held in the library that were sponsored by the museum.
As it turned out, Professor X had charged these people several hundred dollars each to attend a course of pure bushwah. He was teaching it in our library and, at that time, access to the library was free. From his point of view, it was the perfect thing.
1) He could say that his course was being held at the W Library in the Z museum. That gave him great credibility among his audience.
2) When the class was together he could ask library personnel to bring whatever he wanted to the table and we would do it. That increased his credibility and power. In his eyes and in the eyes of his students, we were there to do his bidding.
3) He didn't have to pay any money for class space. He didn't have to pay anything for class materials. Everything he needed was here for free.
When we discovered that he was holding a class in the library that the museum did not authorize and for which the museum received no money, the thing was shut down very quickly.
However, for several years afterwards we'd get phone calls asking when Professor X would be giving his class in the W Library.