Applying Occam's Razor to the observation of nearly identical, but slightly varying, posts on multiple and diverse forums, we may come to a conclusion that is not sinister, but maybe rather sad: there is a genuine person who is weighed down with responsibility for a young sister/daughter, feeling rather lonely, and writing these posts to try and make conversation. The variations between the posts are to protect the identity of the young lady.
So ease up, lads!