Obviously I can't be there, but I was at the rally in Rome against war in Iraq in february 2003, when in many big cities all around the world people marched for peace. Then we all know what came next...
btw in Italy (don't know about other countries) it's been used to have a "peace-flag" at the windows of own house. I had it too for years, until the flag got to pieces (and peace too...).