a geek strike, yknow, just kind of a reminder, "hey, we run the world, are you sure you want to fuck with us?" kind of thing.
Or maybe not a strike, but more pranks on the scale of things we can control. Sort of like the MIT Hacks, but writ even larger.
Like, I've always wanted to place grossly undersized air diffusers over where an executive's desk would be, so they've got this jet of air blazing on their desk, and no papers will ever stand still without multiple paperweights. That'd be a pwn.
Or boost the pressure on floor drain trap primers, that way every time someone flushes a toilet in a bathroom, water shoots up like a geyser out of the floor drain nearby.
yknow, fun little things.