Yesterday at the Australian Tennis Open we were witnesses to a Mexican Wave out on one of the smaller courts. An audience wave can come around pretty quickly in a small tennis stadium. They also had a double wave going, the wave going in alternate directions and seemingly passing through each other – I had not seen that before. I have also heard of crowds coming up with combinations, changing speed, and bouncing back in the direction it came.
A few stadiums are discussing the option of stopping audiences from making the wave, as it is considered dangerous. Although this wave at the tennis was just a ripple as far as waves go, I would have to agree that they can be dangerous when people start throwing objects and drinks as the wave passes, and it can be distracting if you are trying to watch a game being played.
If they can control it so that waves are only done during breaks in the games, and stop people from dangerous throwing of objects.
It may be easier said than done, as a log day at the cricket or tennis, after a few beers, people will think they can get away with whatever they want.