It's definitely a possibility. There were a bunch of Europeans who had an Omaha-8 collusion scam busted. Don't forget 1-table sit-n-gos also. Wouldn't be too hard for a few buddies to buy into the same one.
The beauty of online poker is these guys are easy to spot. You know IP addresses, hole cards, and exactly who played how many hands with whom and against whom. If you suspect something, report it to customer service. They look into these things pretty closely. Unless it's AP.
