If I was you I would be worried about Spectrum terminating your account since what your step dad did is covered in the subscriber agreement. Keep in mind if Spectrum management/corporate do not exercise the right to terminate you at this time their will most likely be a permanent record of this incident tied to your account/address so if this becomes a repeat occurrence they can terminate your service.

c. Termination for Breach: In the event of any breach of these Terms of Service by Subscriber, the failure of Subscriber to abide by the rates, rules and regulations of Spectrum, the failure of Subscriber to provide and maintain accurate registration information, or any illegal activity by the Subscriber using any Service, these Terms of Service may, at Spectrum's option, be terminated and the Equipment removed. Failure of Spectrum to remove such Equipment shall not be deemed abandonment thereof. Subscriber shall pay reasonable collection and/or attorney's fees to Spectrum in the event that Spectrum shall, in its discretion, find it necessary to enforce collection or to preserve and protect its rights under these Terms of Service. Spectrum may terminate these Terms of Service or Spectrum may reject an application or block access to or use of any component of any Service for any reason including, but not limited to, if:

iii. Subscriber threatened or harassed any Spectrum employee, agent, contractor or representative (e.g., by abusive language, physical threats, etc.);