It's only a felony if they find this forum and link it to your name. Still, it'd be better to think twice before posting these things.
Why would it be a crime to photograph your own ballot? And if they're worried that you're doing it because someone's intimidating you, why would they threaten to punish the victim of intimidation?
That is not the idea. This is a classic case of a law ending up applying in ways it was never actually intended to apply. The idea was to prevent people from taking pictures at polling places, including pictures of ballots, to intimidate others. But since the wording is just about taking pictures at polling places (because, if you word it so that taking a picture of your own ballot is all right, some people will figure out a way to just "happen" to do so in a way that includes someone else or someone else's ballot), you are breaking a serious law even if you just photograph your own ballot. The irony is that the goal of the law is to protect freedom by keeping voting secret, but it ends up restricting freedom by not allowing you to provide "photographic evidence" (I put that in quotes, because of the ease of retouching photos these days; a photo of your ballot doesn't actually prove anything at all anymore) of how you yourself voted, despite it being perfectly legal to tell people how you voted.
Some people feel the need to prove how they voted when some ass challenges them on the honesty of their declaration. In my world, busybodies can go fuck themselves. Believe what I say or get the hell out. And that is, even if I say anything. Because, frankly, it isn't anyone else's business.
I took a picture of my completed ballot, but did not post it to Facebook or Twitter. I had a funny feeling that it might not go over well, but later found out it is a felony in NY when Sean Hannity posted his ballot and deleted it. Give the ubiquity of cameras and accusations of voter fraud, I think this rule should be re-evaluated.