Was this an unannounced invasion, or did you have advance warning, Raven?
We did have a previous conversation something like this:
Mr Raven:  What are you building?
Me:  A supermarket.
Him:  Oh! The Gang will want to go to the supermarket!
Me:  No!  They are NOT invading my supermarket. This is a sensible supermarket.  They can keep well away until I have finished it.
And a few days later:
Mr Raven:  Is it all finished now?
Me:  Yes.
Him:  <evil chuckle>
So... I was kind of expecting it.  And I think, actually, that their presence improved the look of the place.