I know exactly what you mean.
I first saw this story on Sky news where they interviewed the lovely family in America. It was so awful for them, they genuinely thought they had an intruder in the baby's room and the dad noticed the baby monitor moving remotely.
They even had the person doing it shouting abuse and unrepeatable words to the parents whilst they were trying to find out what was happening.
It must have felt like you were in a room with a demonic ghost for a while.
I have also read a lot about women being 'viewed' on their home computers, this is all very sickening and it does make you think doesn't it.