Who's that Baby?

I thought of this story as I had to tip-toe back in to turn on the baby monitor after i had already put the baby to sleep.  This story happened three years ago, when M was about four months old, but it will haunt me forever.
After putting the (then) baby to bed, I walked into my room (a few feet away) and switched on the tv portion of our video baby monitor.  i glanced down at it as i was walking away.  i did a double-take.  i walked back and stared directly down at the screen.  the first thing that caught my attention was that the baby had moved halfway across the crib and diagonal- like i said, i had walked only a few feet away.  and, she wasn't able to move like that, yet!)  the second thing that caught my eye was that the crib slats were wooden.  we have an iron-barred crib.  the third (and GLARING) thing i noticed was that this was NOT MY BABY!!!  I gasped!  I broke out into a cold sweat.  I paced back and forth.  I turned the screen off, then on again.  I began to cry.  I was terrified.  I would have been better off if the little girl from the Exorcist was staring back at me when i turned that screen on.  Seeing another baby on my baby's monitor was seriously enough to put me over the edge.  
Once I had run in to check that the baby was okay (she was!) and I had calmed down a bit, i realized that i had switched the channel by accident.  When i switched it back to the correct one,  i saw my own child in the center of her iron-barred crib, peacefully oblivious to the nervous breakdown i was nursing in the next room.
So, i unplugged the monitor and ran in to unplug the camera portion.  i packed it into a box and never used it again.  it really freaked me out.  because once everything really did settle, all i could think about was that if i could see that other person's baby, who could be seeing mine?  and that was where i drew the line.  we went monitor-less from that point on.  
now, three years late, we do have a sound monitor that we use with B.  i hadn't thought about this incident in a while, until something struck me today.  anyone with any device which broadcasts on similar channels could potentially pick up our waves.  up until today, i had not turned off the transmitter part (that sits in her room) at all.  literally, it's been on since we put it in there.  out of nowhere, i had a paranoid thought today and imagined some sicko listening to all of our conversations through the small receiver that comes with every $15.99 baby monitor from target.  so, i flipped the switch off.  i walked away thinking about seeing that other baby in the video, and i've had the heebie-jeebies all day.  
and then, when i came out after putting her to bed, i realized i forgot to turn it back on.  so, i snuck bak in to do it.  and then came to the conclusion that i'll probably forget to turn it off tomorrow, and i'll probably forget this story for another couple months, and whoever is listening in will probably laugh at my endeavor.  or maybe, just maybe i'll try to go monitor-less again.  maybe.