Ultraviolet currently does not stop a user if a user has been reported previously. This (obviously) leads to duplicate reports.

Checklist:

• Detect if username-to-report is already on the page (and on the specific section marked by UV config)
  • Detection should be performed asynchronously and in the background, as soon as the user has been set (or when the dialog opens). (+1 parse&prop=sections,wikitext call, can be combined with above)
• Add support for other sections *to check for* in UV config
• Provide a snippet of the reporting comment (read whole line, strip leading asterisk or hashtag, if any), check if the reporter is a bot (+1 query call)
• Add support for preconditions to check for in UV config
• Add support to allow checking if user is blocked prior to reporting
  • If user is blocked, report details of block