I may have taken this out of context, but in the right situation, this might not be that inappropriate. Perhaps I am just taking this personally, because I have a toddler, but if a room is appropriately set up for a one year old child, it is possible for the child to safely explore and play with the caregiver nearby. While I would never allow my child to play unsupervised for long periods of time, I will allow him to wander into his room, and moments later I will check on him. While I stay close, I don't think that it is inappropriate. MOO.
I hear what you are saying, Rose Tree. With my kids, at that age, I found that while they enjoyed playing independently for short periods, they seemed to want to do so in the same room I was in. As long as they had the assurance/comfort that I was in the same room with them, they could play for quite a bit at times, independently. While they are older now, that still seems to be the case intermittently, where they like to be in the same room, or the room next to the one I'm in.
My thoughts on why this is bothering some posters (and i'm not trying to speak for them, just thinking of the angle they might be coming from) is due to her bizarre behavior. I noticed on her fb page, the day or day after Kyron disappeared, she and another male friend of hers on fb were having fun poking each other on fb. At one point she posted (paraphrased) 'LOL! i know its addicting!' Seems an odd thing to be engaged in when your child has been missing less than 48 hours, no? Flirting with a guy on fb?
Or how she was found to be sexting with Kaine's friend MC shortly after Kaine left with the baby. If it was me, I would be crushed that my child had been taken from me. Sex would be the last thing on my mind.
So just by the above two examples, I am guessing that some view her letting the baby play by herself in another room without showing any concern, as another example of Terri's selfishness and self-centeredness; how her needs always came before those of the children. Its as though the baby was her 'trophy baby', benefitting her only when she got the 'oohs' ,'aahs' and compliments when out with her in public, the stores, school, etc. But at home where no one is around to donn on the baby, a 'reflection' of Terri, if you will, I can see where she would rather leave the baby in another room and get engulfed in fb, her internet games and who knows what else!
Again, just an observation I believe based on what I have learned so far of her.