I just looked at the YouTube video of the two "security" guards at a Philly polling place. They were intimidating white voters? No, I do not think so - you can see white voters coming out of the building. No black person said anything intimidating in the video. According to the Christian Science Monitor, this was the only Black Panther "intimidation" that was reported - I think I read it correctly. New Black Panther Party voter intimidation case: 'Bombshell' for Obama? - CSMonitor.com

One polling place - 2 "security guards" - massive intimidation, I don't think so.

No one's civil rights were violated as far as I can tell.