If you are in the same room with a business card, the game thinks the card that has your name in it is the first object in the room, and directs speech toward it, sometimes causing speech to disappear entirely. This also creates an issue for followers if you are carrying one of your own business cards around. They attempt to obey the commands of the business card over you. Perhaps business cards could be referenced by the person's company name "Skywatch Business card" rather than the person's name? Or simply left as "business card"?
There are potential problems this could create for more intense RP situations that could really screw with mechanics.