I've just noticed that a channel called "Hopster" has appeared on my Roku Express device?! I'm wondering how this channel could have seemingly "auto-installed" itself? Could this have been installed with the recent update to OS 10?!
Are you using one of those screensavers with things scrolling by including ads for other channels? Never use Play/Pause or Select/OK to dismiss a screensaver.
Ah, that could be it! Thanks. And those ads that appear on the main screen as well?! So, accidentally clicking an ad when fumbling with the controller can install a channel without any additional prompts?!