Christian Science Monitor: SpoofCard phone case: Messing with caller ID isn't always funny To stalk and terrorize his ex-girlfriend for months, a Miami lawyer secretly affixed a GPS tracker to her car, then used an online program known as Spoofcard to mask his phone calls to her, ... This calling card can reach out and touch someone’s wallet. Little-known SpoofCards are sold in novelty stores as the ultimate practical joke.

Understanding the Context

They enable prank callers to change their caller-ID ...