Maybe I don't understand the mechanics of what has happened. Can you not access your own posts from the locked subs?
In any case this is unfortunately a consequence of reddit delegating moderation to the community : clearly the mods did have the "right" or at very least the "authority" to do what they did.
@jackiebrown even if only a substantial minority of reddit users deleted their accounts & content that would still be a problem in the status quo. The reason I asked is because if you can still access your own posts, even out of context, then the mods haven't really taken anything from you.