Xexox off on color paper a little flyer to be placed on each table (and put them there as if you are delegated to do so, at each place setting) :
Martin Luther King quotes :
"In the end, we will remember not the words of our enemies, but the silence of our friends."
"The hottest place in Hell is reserved for those who remain neutral in times of great moral conflict."
"Injustice anywhere is a threat to justice everywhere."
"A right delayed is a right denied."
"He who passively accepts evil is as much involved in it as he who helps to perpetrate it. He who accepts evil without protesting against it is really cooperating with it."
"The moral arc of the universe bends at the elbow of justice."
"The time is always right to do what is right."
"I have a dream that my four little children will one day live in a nation where they will not be judged by the color of their skin, but by the content of their character."
"It may be true that the law cannot make a man love me, but it can stop him from lynching me, and I think that's pretty important."
And then have the URL of Liestoppers and FODU and some other good blogs listed at the bottom as "suggested for further reading".
These are great ideas! Keep 'em coming . . .