Am I really Welcome?

You know those "Welcome" flags you see as you are driving through a neighborhood? They hang off the porch or are on a wrought iron trellis thingy...they have flowers on them, or they say "Welcome, Friends!" and look so nice...but am I really welcome? If I walked up to the door, rang the bell, would the occupants of the house welcome me in for a cup of coffe and a slice of pie? Would they turn me down if I asked for a cup of coffe and a slice of pie and look at me like I was a serial killer or would they really welcome me in? Somehow, I think it's all a sham and they wouldn't welcome me in and would probably shut the door in my face.