The times in between the main food times (breakfast and twilight refreshers) are best for "hanging out" on the fourth floor. Also, there are seating areas on the third and fifth floors that can accommodate the non-dining, smart phone crowd during the main dining times. The first floor is always an option, too.
And yes, the CMs and management are aware, but Disney's "guest friendly" policy sometimes has priority over inappropriate deportment.
[Fortunately, V&A's is the ultimate oasis of tranquility.]
All the best.