2) Wrong, but thanks for the bad information.
3) I guess my Legendary status and five years here screams Newbie. Re-posting a deleted post is ill advised, although I did rephrase the question to be "on topic"
1) I don't mean threads, if you find a post that is very off-topic and want revenge( ) , go for it lol
2) Do you have any source? I can give you the exact post from BadBear that says posts cannot be restored by mods, they can only be seen or restored by admins which is more than not worth the trouble here IMO.
3) You can do so in a self-moderated thread but yeah if no mod confesses that he accidentally deleted the post. It would conclude that the mod who deleted the post(a global moderator) did it not by mistake, it wouldn't immediately get you a ban but at least you would be sure