The risks of using unsecured home automation systems and IoT devices include:

1. Data or personal information being stolen or compromised
2. Malware and malicious software being installed in the device and connected networks
3. Hacking of the device and networks
4. Unauthorized access and control of the system and devices

To secure your home automation systems and IoT devices, it is suggested to:

1. Regularly update the security settings of the system
2. Avoid connecting to public or unsecured wi-fi networks
3. Use strong passwords to protect the devices and accounts
4. Monitor the system for any suspicious activities