[mickgardner]

In Australia this (fans of different teams sitting with each other instead of separate) has been normal for AFL (Australian Football League) matches since forever. It creates an atmosphere of friendly rivalry and discussion amongst people sitting near each other instead of animosity. You commonly get some quite funny and friendly banter going on between rival supporters.

[zimpenfish]

Pretty normal for UK Rugby too. I've been the only away supporter sat in the middle of several hundred home supporters without incident (apart from some gentle mockery as we meekly capitulated.)