The answer to this question is generally no, but it depends on the specific model of your smart TV. Most modern models have built-in security measures that prevent someone from seeing through your TV without your consent. However, older models may not have these features and could be vulnerable to hacking attempts or other malicious activities. Additionally, if you are using an internet connection with a wireless router in your home, it's possible for someone to gain access to your network and view what is being shown on the screen of any connected devices, including smart TVs. For added security, make sure that you always keep your passwords secure and never share them with anyone else.