How many images do you see not blacklisted in the following search?
sailor_moon sailor_moon_(character) limit:100

If you see none, your blacklist is working correctly. Keep in mind that blacklisted images will only be hidden on search pages, history pages and profile pages.

If you see all the posts in that search, there's a problem with your blacklist (eg. Typo, non-spacing characters, unsupported whitespace characters). The line you pasted above works for me. Try clearing your blacklist completely (Ctrl+A, Delete) and entering the line again from scratch.

If you're only seeing one or a few posts in that search:
  • Double check that the two tags in that search are really the same two you have on a line of your blacklist
  • Clear your browser's cache
  • Try a different browser