Me: *preparing to make a meatloaf while making buzzing sounds*
Only other person in the kitchen: "I knew you were practising being a Jedi in your sparetime!"
Me: *looks up* "Who, me?"
Only other person in the kitchen: "No, all the other people in here..."
Me: "Oh, you see them too!?"
Only other person in the kitchen: *looks up at me, clearly creeped out*
Me: *smiles creepily* "I'm so glad I'm not alone anymore!"
Only other person in the kitchen: *takes food and slowly backs out of the kitchen*

Just to be clear: No, I don't see people who aren't there.