What is pretexting? How is this used?

Pretexting is a method of inventing a scenario to convince victims to divulge information they should not divulge. Pretexting is often used against corporations that retain client data, such as banks, credit card companies, utilities, and the transportation industry.

that would be called plucking : )

explanation:

''plucking, also referred to as quarrying, is a glacial phenomenon that is responsible for the erosion and transportation of individual pieces of bedrock, especially large "joint blocks". as a glacier moves down a valley, friction causes the basal ice of the glacier to melt and infiltrate joints (cracks) in the bedrock."