Here's What Disneyland and Disney World's New Star Wars Land Really Needs: A Bathroom Pass
I guess this is better than random people constantly pushing past you in line claiming to be rejoining their family.
From USA Today:
“You will be given a pass the size of a credit card attached to a lanyard. On it are the name of the attraction, the words ‘Queue Re-Entry’ and, prominently, the silhouette of a running person. It may not say ‘Bathroom Pass,’ but everyone will know why you need it.”