While it's certainly possible that that user was trying to get something for nothing, like FG said - I think that if they really were trying to scam A, he or she would've been much more vocal (even "over the top") with their criticism, including providing fake details and demanding to be re-sent what they ordered. But instead, the posts they made were brief, vague and almost seemed like they didn't care too much. Maybe that person finally received and just stopped posting here, like someone already mentioned.
The few people I've seen try and scam the vendors were from the old DB board. One that I remember wouldn't stop posting (literally like 20 posts over the course of a day in that vendor's thread they were trying to scam) about how they were ripped off and how they demanded to be re-sent what they ordered. Many other DB users of that vendor mentioned how strange the whole scenario sounded, and began to question the poster about specifics and whether he was lying.
One of the mods finally asked the poster to post or PM or email the Mod proof. Telling the guy that if, in fact, he did have proof, that vendor would be contacted about the dispute and unless it was corrected, it would be posted all over DB that they were scammers people and they would be blacklisted. Well, needless to say, the accuser posted that he didn't need to show anyone proof, never contacted the Mod and was banned from the forum.
Anyway, nosferatu hasn't returned to post again, so who knows? Like many on here, I've dealt with scamming vendors before, but over the last year and a half, A has ALWAYS been straight with me and I have never heard anyone that actually had some kind of problem with her and did not receive their order in the end.