The obvious solution would be to ignore a prankster.
A legitimate law enforcement agency doesn't alert a person about an arrest warrant.
A real law enforcement agency would simply locate you, travel to the location where the suspect resides or works, and effect the arrest.
A prankster, scammer, or a collection agency would employ suspect methods to intimidate their target.
The only exception to the aforementioned tactics by a legitimate law enforcement agency would be for a high profile person, as in a known personality, wealthy person, or political figure. Those individuals are usually arrested after the agency makes arrangements for the target to surrender himself/herself at a prearranged time and location.