OK, so Seb mentioned in another thread about banners, maybe we should share ideas, see if a load of us can arrange to have the same ones at the same shows, get a strong message across.
Obviously sometimes it's about requesting specific songs, so it depends what we all want, but sometimes I like seeing the ones with puns, a bit of word-play with the song titles/lyrics. I only started this because I was out earlier and thought of one myself...
"You've seen our faces - now rock them all"
Yes, I know it's crap, but I like it

Or how about
"Hey Jon! Seems like all the good sets have gone"