The BBC website also has a long list of banner lines posted.

I’m a little annoyed but I’ll get over it
Somewhat irritated about extreme outrage
I’m irritated as heck and could probably take some more, but would prefer not
I’m pretty content actually
We have nothing to fear but fear itself and spiders
Cheer up, it’s only politics
I disagree with you but I’m pretty sure you’re not Hitler
I’m here from the internet to put captions on your rally
Hyperbole is the antichrist
Obama - re-open NY subway toilets now
Look at my ironic hipster sign
One nation under Aqua Buddha
Birthers for Hawaii statehood
Signs are an impractical medium for civil discourse
I leave binary thinking to computers

America, I love your sense of humor!!

(Come to think of it, you can almost consider this a poem.)