Last night at EWR, UA assigned five flights (with a sixth just landed) to Carousel 1. There was a huge crowd packed around the carousel, and then the bags came out, they were mixed between the arriving flights. I looked over at Carousel 2 and 4 (there is no 3) at there was no one at any of them. I realize that multiple early/late arrivals can cause bags to arrive at the same time, but you'd think that UA would have had plenty of time to change carousels to spread out the baggage arrivals.