When driving to work this morning, I noticed a bunch of police cars blocking off 101S on Fair Oaks, and considered turning around to take central instead, but since it looked like something potentially interesting was happening, and 101N seemed to be moving, although somewhat slowly, I took it.

Turns out, I caught the beginning of a parade of hundreds of police officers from all over the area.
It was a bit surreal, hundreds of officers in a single lane (carpool lane) in an otherwise blocked off Hwy 101, with all kinds of police vehicles, vans, limos, etc, going on for 20mn+ while I was driving the other way, taking pictures, and trying not to rear end the car in front of me :)
Turns out it was to honor officer May, who was brutally shot and killed a few days ago in East Palo Alto.
Read more from sfgate

After I posted the pictures at work, soon after people started asking WTF happened on 101S (since it did mess with commute traffic in a pretty major way), it started a long thread as to whether inconveniencing thousands of commuters, and causing accidents on 101N.

It's hard to say. At least, they did reach their goal of drawing attention to the problem.
I personally give to the CHP 11-99 foundation , a worthy way to help.

The other pictures, and a few videos are here

No, you may not make comments about how taking pictures and movies while driving was probably not a good idea. Some people did crash on 101 due to watching the officers, but I didn't, I'm better than that :)