If you're annoyed at how they clutter the "show unread posts since last visit" page, then you can add those boards to your ignore boards list. (I'm thinking of changing this page so that you can click a button next to each thread to ignore the board it's in.)
If you're in the mood to make changes to the forum, please consider adding an "unwatch" link to the watchlist page next to each thread.
Here's the problem I encounter:
- I configure my watchlist to automatically add all threads in Bitcoin Discussion
- People mispost crap threads in Bitcoin Discussion that quickly get moved to the correct area
- I'm still Watching the crap threads, so the watchlist is less useful than it could be
- Removing the crap threads from the watchlist means opening each one individually to access the unwatch link, so it's usually not even worth the trouble
- Therefore, it's easiest to only read and post in Cypherdoc's "Gold collapsing, Bitcoin up" thread instead rather than attempting to use any other part of the forum.