Yes I always forget, this forum is for serious discussion of 10x'ing only.
You don't get 'hellbanned' for dumb jokes.
Why does it say [flagged] when it's clearly [deleted] ?
I guess its because it was deleted by moderators instead of deleted by himself.
It was flagged by users and then 'dead' because of the number of flags. You can turn on 'showdead' to see it. It wasn't deleted by moderators, they're generally quite open in the (rare) cases they modify a comment or ban a user.
I believe comments can't be deleted after they've been replied to.