While the tone of the letter speaks volumes as to the poor character of the POS who wrote it, I really can't see any reason for law enforcement to get involved. Unless Canada enforces some draconian, negative paradigm of free speech.
Oh, I wouldn't dare scar a Louisville Slugger with the blood of a self centered piece of garbage like that author either. Two words... Pinch Bar. Much easier to clean with a blow torch.
Respect the bat for the work of art it is please.