Assuming that the other side of this story is somewhat as it has been portrayed, blogging about the issue with the potential to reveal the name of the startup might encourage them to clear up "the misunderstanding".

Heck, you might even just email someone with some equity a link to this story.

Look into California labor laws. Even though old link, I found this: http://www.labor.ca.gov/pdf/lwdalaborlaw99-03.pdf

It states "It provides that salary may be not be used as an excuse for employment termination decisions if it disparately affects older workers."