Mo. Rev. Stat. § 565.405: Cyberstalking, offense of — penalty.

1. A person commits the offense of cyberstalking if such person purposely or knowingly engages in a threatening, aggressive, or otherwise fear-inducing, course of conduct by using digital technology, internet service providers, electronic service providers, or other electronic communications and devices to enhance the ability to intimidate, track, follow or cause reasonable fear, alarm, anxiety, undue stress, or terror to another person.

2. The first offense of cyberstalking shall be a class A misdemeanor. A second and any subsequent offense shall be a class E felony.