I don't get around here nearly as often as I'd like, so I hope I'm not always sounding like I'm talking about a totally different case when I just post what I've been thinking rather than responding to all the posts that come before mine. Anyway...
I've been thinking about a_s, catfishing, etc., and I think I remember KAK saying at some point that he was going to meet up with Libby but she didn't show up. If he didn't say it, I'm going to go on the assumption that it's true just for this scenario.
I'm sure that a lot of people realize that in addition to older people pretending to be young, there are also very young people pretending to be older than they are. I've been wondering if LG may have been pretending to be a bit older than she was, and possibly pretending that pictures of her sister were actually her. If KAK, his father and/or another "a_s" persona had planned to meet a 16 year-old girl (who had no knowledge of the meeting) and instead found a 13 and 14 year-old pair of girls, it's really hard to say what his/their reaction might be. The girls, or just Libby if Abby wasn't involved, had just mentioned the possibility of going there, they may not have been expecting anyone to meet them there. It's possible that BG noticed a family resemblance called her by name. Having an older, and probably not very desirable, guy you've never seen before calling you by name would most likely freak out a young girl a bit (or even an old lady at times!)
Anyway, I've just been trying to find a way that some of what he's been saying might be true.