Answered by various utilities, security is a top priority for utilities:

AEP Ohio: The privacy, protection and disclosure of personal information are important to AEP Ohio. Cyber security is essential to the success of any smart grid project. AEP Ohio intends to advance the cyber security of the smart grid by establishing a dedicated cyber security operations center in Columbus. Cyber security is a familiar concept to the utility industry. They have extensive experience maintaining security on the information systems needed to operate the electrical grid. Installing advanced meters adds a new component to their system, but the meters, communications and information management will be subject to the same Department of Energy security standards that keep the grid secure.

SDG&E: The Information Technology (IT) security controls SDG&E have in place for smart meters reflect energy industry best practices. They are designed to provide a very high level of assurance that our systems cannot be compromised. SDG&E considers security a top priority. SDG&E takes all reasonable and necessary steps to ensure the services they provide their customers are not only high quality and easily available, but also extremely secure. In addition, they constantly monitor for evolving threats and attempts to breach security and progressively update their system protection as needed.  They also regularly review, test and practice incident response processes.

SCE: Security protocols for Edison SmartConnect are adapted from the banking and defense sectors in order to ensure the highest levels of security and privacy. All information transmitted between meters and the utility is encrypted using U.S. government-approved and recommended standards, and we work with federal and state agencies to stay ahead of cyber threats.

No, it is illegal and unsafe to do so. Other than some limited exceptions the utility owns and maintains the metering equipment. This includes electric and gas meters used for measurement and billing, and other equipment such as transformers on the ground or on a pole.  Removing or tampering with the property creates a safety issue, which may result in termination of service, and is considered a crime. If done improperly it can result in serious injury or death. Licensed electricians must contact utilities when work requires a meter to be removed, reset, or the power cut or reconnected at a customer premise. 

Many power companies now offer products and services to help their customers take advantage of the smart home. For example, many power companies offer an online marketplace, an Amazon-like website that allows you to purchase smart home and energy-efficient products, often with a significant rebate or incentive applied. On ComEd Marketplace, a website for Illinois’ largest power company, customers can purchase a Google Nest Thermostat for only $69 after instant rebate. Some power companies may give you a free smart thermostat or significant rebate if you enroll in a program to move your energy use away from times of high electricity usage (for example, the early evening on a hot summer day). These programs help power companies avoid using costly energy, and those savings are passed along to all customers, as well as the extra bill savings if you participate.