I'm wondering if there is something more sinister behind it like a set up for either robbery or blackmail?
Yes, there can be any kind of agenda at the back of a false review... touting, b&s, damage repair, robbery etc etc or even genuine.
everybody starts somewhere on here but if the reviewer doesn't come back on to retort the comments then it's all a bit shady looking.
The longer they leave it, the less credibility they, their review and her have.