Given the previous lack of interest on the part of our public officials (DA, Sheriff, etc.) it probably serves little purpose, especially if any advanced notice is given, but I would hope that folks who feel the urge would show up individually, to voice protest without support(spend no money there). Actually, individuals, in independent little enclaves, can make a lot more noise, be seen by a lot more folks, and make more of an impression. The "respectable" folks, in their respectable togs, tend to lend more effect to suburban demos than do the "radicals" from the inner city, even though the latter usually go to a lot more effort to get there, and do it with a minimum impact on the environment (bike, hike, hitchhike, bus, etc).
Let's make it known that we do not accept the grand jury's verdict, that it is somehow o.k. to torture, then kill, an injured, burned, unarmed, naked man.
We could also let them know that Carlos Rubio was not just another marginalized poor person who nobody cares about.