First off, the damn thing is being organized and talked about with all the fervor and finesse of guerrilla terrorism, and I hate to use that term, but damn. Beyond that, face it, there is not gonna be any real impact unless the majority of the user base...and that's a fuckload more than you are reaching...actually up and leaves. One day with no posts? Big whoop-te-doo. I see now a suggestion to follow this with a day of posting as much as possible, trying to 'take down a server or two'...right, so you can still be seen as hostile, and thus, not what LJ wants around here, anyway.
What brought this on? The fact that SUP (who bought LJ recently) decided to do away with the creation of new Basic-level accounts. now, it's either adverts or pay for it. What's truly killing me is how the main argument people seem to be quoting over and over again is how existing users create new journals all the time, and that it's not fair they should have to pay. Hello? Hosting, hardware, and bandwidth costs money, and making multiple journals just ensures more load, thus you are MORE in need of paying, bitches.
Face it, "free" stuff on the 'Net is never what it seems. This is a business, and it's here to make money. It's not like it's breaking you to pay the tiny amount that a journal costs, and it's not like there aren't other places you can go, if you are THAT much of a whiner about it.