An idea for the fourth of July: maybe at, say, midnight neighborhood folks could show up at the lot with sparklers (or they could be provided as people enter), light 'em, shake 'em, and walk around. As they burn out, everyone walks away (with what's left; remember, leave no trace). We take some photos, some video, and share it here later.
(Sorry it's a wedding photo, but the idea is the same. Image from BWright Photo)
The whole event would be kind of like this pillow fight that seems to have been great.
Interested? Send me an email. Have experience organizing this sort of thing via the web/twitter/cell phones/smoke signals? Email me.
Let's keep the momentum going.