I do believe that redbaron is right. Provider is looking for channel change. I tried hitting volume control up/down but that doesn't prevent the inactivity timeout. So it is not a 'hit any key' like a PC timeout to the screen saver.
I hit (ok) key when I see the message but that's not the point. I should have some level of control. I understand provider not wanting the folks to leave the house with this running, but the HDMI senses when you turn off the TV. Doesn't that stop the box? That should do it.
If we get the polite box to hit (OK) then the box does have some level of interaction with the provider. How about Dreamlink creating software to see if the user has hit any key within a set-able time and auto-respond to the provider. That would be fair to both the provider and the user. If I am hitting any remote keys, then I am watching the channel even if I am not looking when the polite box comes up on the screen. So it auto responds to the provider once and resets the 'any key' timer. That way it is fair to the provider if the user has fallen asleep or something. It will not auto-respond a second time unless the user is really hitting remote keys.
Just my humble opinion.