I know that a few years ago, Charter sent my mother in law a nastygram threatening to cut off her Internet after a grandson downloaded a couple of pirated movies. It said:
Dear Charter Internet Subscriber:
Charter Communications ("Charter") has been notified by a copyright owner, or its authorized agent, that your Internet account may have been involved in the exchange of unauthorized copies of copyrighted material (e.g., music, movies, or software). We are enclosing a copy of the Digital Millennium Copyright Act (DMCA) notice that Charter received from the copyright holder which includes the specific allegation.
Under the DMCA, copyright owners have the right to notify Charter’s register agent if they believe that a Charter customer has infringed on their work(s). When Charter receives a complaint notice from a copyright owner, Charter will notify the identifiable customer of the alleged infringement by providing them a copy of the submitted DMCA notice. As required by law, Charter may determine that the customer is a repeat copyright infringer and reserves the right to suspend or terminate the accounts of repeat copyright infringers.
It is possible that this activity has occurred without your permission or knowledge by an unauthorized user, a minor who may not fully understand the copyright laws, or even as a result of a computer virus. However, as the named subscriber on the account, you may be held responsible for any misuse of your account. Please be aware that using Charter’s service to engage in any form of copyright infringement is expressly prohibited by Charter's Acceptable Use Policy and that repeat copyright infringement, or violations of any other Charter policy, may result in the suspension or termination of your service. You may view Charter's rules and policies, including Charter’s Acceptable Use Policy, under the policies section of charter.com.
We ask that you take immediate action to stop the exchange of any infringing material. For additional information regarding copyright infringement and for a list of frequently asked questions, please visit charter.com/dmca.
(yes, that scared the h*** out of the M-I-L)
Haven't heard of a problem because of streaming, though.