I would be so inclined to have a forum dedicated to help-desk things, while a separate forum dedicated for the other forum material.
Likewise 'annoyed' of seeing the same question asked. Blocking 'help-desk' tag feels more like a stopgap solution.
We really need 3 separate things: Forum, help-desk, wiki.
People on the forum can contribute to the wiki, people on the help-desk can reference the wiki, and people on the help-desk have a more direct route to getting issues resolved.
i feel we need to keep the help-desk/help-me stuff separate from the forum, because people come here to see interesting projects. If they see a bunch of help threads they either mute them or ignore them and this leads to people needing help being buried and forgotten.