Your TV is probably picking up the remote signal from someone else's remote , garage door opener, etc. . Ours did that a few times.. We called the repair people and they explained it. Just like occ we will pick up a telephone conversation on TV. I won't pretend to understand all this, just that it happens. Now that we have digital cable, we have not had any unusual activity.
So relax, it is not the demons. It is one of your neighbors.