Don't get me wrong, I like this community for what it is, but posts can be a playground for smartarses and jokers, which can probably deter people genuinely looking for help or advice. The meta/in-jokes and non-helpful comments which can dominate can push new users away.
Allow users to tag a comment as helpful/on-topic. Allow users the option to sort by helpful first. Allow users to only get a notification if they get a helpful comment.