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Certainly seems like a very mean hoax.
As someone who lives in the area I can tell you that those MassLive message boards are very unreliable sources of information.
People have done worse things... does anyone remember that case where someone randomly called the parents of a missing girl and claimed they were her? The girl was killed by a serial killer months earlier. The person who made the call gained absolutely nothing from gaining the call, it was just a "joke" to them.