This is an interesting write up. I use to be with someone who was obsessed with following their ex online. I have friends who do this thing as well, but if you are done, what are you getting from this?
I see it one of two ways, either this person is not over that person from their past or they are just one of those people, where the grass is always greener.
I have never been an online ex stalker, but I feel that there is much more to it. I cannot yet properly verbalize it, but I feel there is something much more insidious to the whole thing.