This is not too strange, but I've had numerous situations lately where the address is just barely off from where the passengers actually are. It is almost always a bad situation too.
For example, I'm sitting and waiting at the address and a lady jumps in I get ready to go and she says to wait for her boyfriend. Hear he comes with two bags of trash he wants to load in the car to dump somewhere. Crazy!
I've had situations where the sober friend comes from out of nowhere and asks to wait on their drunk friend and they try to hold the car for them too.
My new plan is that if they aren't waiting, slip away from the address and wait for them to to show themselves. Then, do things to stall and trip them up. I figure an honest rider is going to understand if they gave you a wrong address.