Sometimes it’s unintentional- especially in a new setting after a major life change or during times of personal problems but I would argue that the intentional use of people for personal clout and benefit is usually very intentional and a red flag for narcissistic behavior. Thoughts?

Like energy vampires in steroids they will eventually use up the goodwill and patience of those around them until they have to move on to another group or individual (victim). Unaware of their identity crisis they become the shape shifters and grifters of mom groups, school cliques, sororities et al