All humans and animals rely on communication with others just to survive, let alone have a comfortable life. If this communication is sabotaged in any way, the results can be devastating for both sides of the party, simply because everyone wants to believe that their message went through unscathed and that the other person can and will respond. Nobody wants their letter to be stolen in the mail, nobody wants their call to be interrupted by a passing storm or cut wire, and nobody wants to be manipulated by someone else masquerading as their intended correspondent.