I froze a few inside the shell, but it was by mistake. Turned the fridge down too low and the corner they were in was particularly chilly. I couldn't believe it when I needed an egg for something, pulled one out and hit it on the counter - nothing! I thought, is this hard boiled and I didn't mark it? Anyway, had to get a thawed one from a neighbor. We did end up using the remaining frozen eggs for something, after a careful thawing. I'm surprised they didn't burst when they froze.
BC