open house, but not THAT open

So there is a couple that came through our open house today. This is the FOURTH time they've been here. FOUR. It's like they already live here. I'm starting to feel... I don't know... violated? I mean, they just keep looking at it, but never make an offer. I think there should be some sort of limit. The thing is, they love the house, but they don't know if they can get financing. What is it with people? Ugh, GO TO THE FUCKING BANK!!! It's just down the road for corn sake! They said they are going to go to the bank. Yeah. That is the same thing they said the THIRD time they looked at our house. I don't even know why they would move here, they live just up the road four blocks. It all sound strange to me.