I actually was not turned away (only spoken to very rudely and in a condescending manner in front of everyong present about arriving late).
However, prior to that day, I have arrived ON TIME to almost every race weekend for the past 4 years to work as a volunteer. Yes, also getting up at dawn to head out to Mission from Delta.
I would have thought though (and the reason I was upset by all of this) is that a little respect was not too much to ask for, despite my late arrival, considering how much time I have spent volunteering. If I had been told in a polite and considerate manner that late arrivals were not acceptable (even though for years I have seen people arriving later than myself and not receiving similar treatment at all, as the more help the better, no matter when you arrive they were always welcomed), I would be left feeling better about the whole situation. There are no "rules" in place regarding the corner workers having to arrive at a certain time. Yes, I know that we are asked to be there for the safety chat and whatnot and it is best for everyone involved if they know that all the corners are fully staffed, however, if the only way I could make it out to volunteer that day was by arriving late, if I had known I was going to be treated that way, I would not have come.
You've set an expectation of yourself now & I guess because you're a "staple" out there someone noticed when you weren't. 
