Get your finger out of my face!
Should neutral cubes be counted for evaluating whether a blockage occurs?
Yes, neutral cubes definitely factor in when calculating blockages. I learned the game from David so I guess I never noticed the terminology in the rule book. The neutral cubes still represent other people in the airport so "party" is still an appropriate term, but if it's used elsewhere to refer specifically to the cubes belonging to players, I can see the confusion.