@Darth
Thanks for the post.
If the Roku TV is connected to a shared wireless network, mobile devices that are connected to the same wireless network potentially have access to controlling your Roku TV through the Roku mobile app.
In this case, we would highly recommend adding a PIN to your Roku account, for more detailed information about Roku PINs, visit our Support page here: Create, reset, find, or delete your account PIN
Thanks,
Danny
Danny R.
Roku Community Moderator