Thanks for the feedback.  The imbibing of too much coffee is beyond the scope of what we can fix 🙂 but we can definitely take a look at “disabling” the submit button once it has been pressed the first time.  Great suggestion.

The inability to remove duplicated or accidental comments is tied to the security model applied to members’ accounts.  The model allows the editing of one’s comments but not the removal of them.  We’ll review the security model and discuss the ability of members to delete their own content.  Thanks for bringing this up.