My gut tells me that the contact email address 'backwages@aol.com' speaks more to the true intent.
I did a search on the address and he is an active member of the Library Union in California, but his posts elsewhere seem constructive not inflammatory. I believe his stated goal is just what he says. I also think that this may be an interesting history project depending on the slant applied. I worked there in that period, for a brief time, and it was a unique environment compared to the construction of other nuke plants. One of the electricians working there was also the Mayor of a town in Mexico (yes he was there legally) the badges were color coded so that non English speaking workers were always with an English speaking worker who could read the warning signs and postings, San Onofre is bounded by the Marine Corp base on one side and San Onofre State park on the other, and it is only a couple of miles from Nixon's old home in San Clemente. When I rode my bicycle into work along the trails from San Clemente to San Onofre power station I frequently passed by the flood of illegals that funneled between the shore and the Marine base.
If it is kept to just the facts, then an interesting story of San Onofre's construction can be told.