A good way to start a conversation with the meek-looking girl at the front desk would be to not repeatedly comment "Aww, they left you here all alone" and "So you're here all by yourself right?" while getting closer and looking shifty.
Every time someone says that it makes me cringe.
Come to think of it, it's not just FedEx guys, it's also the phone company guys and door to door solicitors - can't forget them! The UPS guys are always very polite though. I'm tight with the mailman too, he's cool.
I'm just a little paranoid.
Good thing I've got an itchy trigger finger and nothing to lose...