1) You stupid sonsobitches got us here in the South into the Ulysses S. Grant and His Amazing Friends show the last time you tried that shit. I do not think letting that happen again is a good idea. We got lucky with Grant being the kind of person who wouldn't be believable if he were in a story. We won't be that lucky in today's era where people are much less romantic about freedom and democracy than they were then.
2) Secession sticking requires a war. If you start one, bring the A Game otherwise you're going to be at the mercy of the victors. And I rather doubt we'd see any modern secessionists given six months to form a government. If you want to play Tamil Tigers, you're going to need to have also people whose idea of fighting a war is more complicated than "LEEROY JENKINS!" because that kind of thing didn't work then and it ain't gon' work now. Nor will being murderous brutes, as it doesn't work elsewhere in the world and it won't here.
2.5) Go fuck yourselves with an electric eel.