Mountain bike etiquette is such a complicated thing. I'm always wrestling with tough issues such as which disgusting jokes to tell, and whether it's the uphill rider who is supposed to have the right of way. On Saturday, I explored whether it's worse to blow a switchback and nearly crash into two friends, or to let my Camelbak leak the entire contents of its bladder so that everyone gets to the trailhead and finds their stuff soaking wet.
I don't think I reached a scientifically conclusive result, by my research appears to indicate the worse offense is to get everyone's stuff wet. But one can do the time for the crime, as it were, when the only other hydration option is to refill the Camelbak with a liter of some disgusting, carbonated strawberry/kiwi concoction after it gets yanked from the cooler.
One of the great things about mountain bikers is that they'll quickly forgive a friend's careless transgressions.
But, ooh, will they give you shit about it!