I smell a negative. Hijacked account?

Sold a cheap card with BIN. Buyer pays on the 8th (3 USPS business days ago). I ship same day. He sends message last night asking where his card is. Is it possible this is a hijacked account? Registered user since 11/2008 with no feedback.
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If you want something to laugh about. I bought a couple autos from 'No Shirt Guy'. He left me feedback within seconds of the auctions end. I paid about three hours later, and he went NARU about an hour after that.
Here's his kind feedback, ha ha
STOLE TWO QULITY CARDS WOH ! DISABLED VET ROBERT ! AAA +++++++++++++ Seller: porshe47 ( 225)
No longer a registered user
Looks to me that the buyer's still in the newbie stage, meaning he doesn't fully understand how long everything takes etc.
His only prior purchase might lack a feedback rating only because the seller didn't send feedback to him and he refused to send feedback 1st.???
I can't see it as being 'hijacked', but stranger things have happened in eBayland.
JMHO,
PoppaJ