I figured. If websites like unddit, ceddit, removeddit etc was able to recover deleted posts and comments, I'm sure the admins can do so too.
But we're also a crafty bunch. There must be a way to destroy the sub where reddit can't restore it properly. Like how a user can mass edit their own comments/posts before deleting them, so when reddit restore them back they would only show the edits instead of the originals. Basically use reddit's own feature against them if we can.
Even small thing like getting rid of the megathread and wiki would discourage people to go into the sub. It's information that people after, if we get rid of those then there's no point in going anymore. Slower death and a little anticlimactic that way though.
Although commonly known as a baby kangaroo, a joey is basically a baby marsupial. So that can include koala, opossum, wombat, etc.