DHL knows the trouble I've seen

When I got my MacBook Pro back on Monday, the DHL delivery guy said to me "They didn't fix it the first time?". I told him no, they made a mistake, so I had to send it back, and he said "Hope this one works." Today, the DHL guy returned again to drop off the box. "It's going back again?". To which I said "Yep. It's still broken." To which, he shook his head. I always drop off the MacBook Pro at the DHL office. When I walked in today, the guy at the counter recognized the box and said "Ah, back to Apple, eh?" Yeah. I didn't ask how many they get, but seeing how he was able to recognize the box. I'd wager it's a pretty common occurance.