Borgata - Collusion?

Just got back from a four day trip in AC and I ran across what I thought was nothing out of the ordinary, but turned into an issue at the table.

10 a.m. Sunday - I sit down at a 2/5 NL which has two guys who appear to be friends (White guy wearing a party poker hoodie and an Indian guy) both who had been up all night. After over hearing some table conversation I learn they are both players from the closed Aces High club in NY and are down in AC because of all the raids lately. Two regular 5/10 players now sit down at my table and within 10 minutes the trouble begins.

Everytime the two friends are in hands they are very observant of each other, and everytime the white guy shows down a hand and loses, whether he had a worst hand or was bluffing the Indian would ask to see the white guys hand that he was mucking. This happened over and over and then the 5/10 player raises hell. "Floor! Dealer, he can't do that once he mucks he mucks, that showing hand B.S. is for collusion". An argument breaks out and finally the dealer and floor decide that once he mucks they will no longer be showed.

What do you guys think, is this a way to tune the way they communicate with each other via collusion?