Originally Posted by TheRoadie

Agreed, but the FAs also react aggressively when even ONE FC passenger loiters up front waiting to use the lav. Doesn't matter what cabin the loiterer comes from. When the "occupied" light is on, you're supposed to stay seated until it's available.

Then there's a little reverse-musical-chairs dance to see who among the seated ones gets to use it next. The most successful ones listen for the flush, then time their rise and first step to coincide with the opening lav door. Too soon, and you become a loiterer. Too late and somebody else listening for the flush is going to sleaze in ahead of you.