None of your listed locations have BART stations, nor did Blackhawk even exist when BART was first built. Danville/San Ramon were farm towns back then.
That said, it was shortly after the Dublin/Pleasanton BART station was built (across from the Stoneridge Mall) that the infamous shooting incident occurred at the July 4 fireworks show at the Alameda County fair in 1998.
The shooter was 24-year-old Jamai Johnson from Richmond, who took BART to Pleasanton. Rival Richmond gangs were at the fair, and the fight started over a stuffed Tweety Bird prize from one of the midway carnival games.
Fromm 1999 onward, the Alameda County Fair has closed at 6:00PM on July 4, to avoid any future incidents
-PJ
Initial BART plans proposed another Transbay Tube from Richmond to San Rafael. Marin residents loudly said “no way”. They have also fought hard to minimize or eliminate bus service between Richmond and San Rafael. Marinites tend to be liberals in good standing, but they continually do things like this with no shame.