I skimmed a bit, but another main reason the opt-out day "didn't work" was that they knew it was coming and decided to rope off most of the machines on that day, so there was no chance to opt-out.

As for handing out literature, etc., handing out a leaflet to a fellow passenger or two in line might be all right, but airports and their jursidictions often have rules about these displays.

There have been some reports on here that the airport will designate the free speech zone to be some out-of-the-way place with little foot traffic and almost certainly no where near the checkpoint. I even recall rules about staying behind the table you're working when talking or handing out pamphlets.

If you search on here and YouTube there have been some fairly good protests on the sidewalk drop-off at some airports. I've certainly been tempted by the idea, and may still do so in the future. My local airport isn't particularly well suited for a sidewalk protest as there's no main drop-off point. Plus, I'll shamefully admit, I'm worried of ending up on some list - wondering if there are better, more anonymous ways I can help, like campaigning for local independent, green, or libertarian candidates.