This is a very suspicious post.
The grammar and spelling in the original message aren't quite right although a non-native English speaker (and also many native English speakers!) may not notice.
If you check the WhoIs for the domain it was created just 2 days before that message was posted and it appears to originate from Poland which then makes it even more suspicious that only US citizens are of interest.
I'd advise anyone that replied with personal details to check that they haven't given away important information that they may regret.