All posts marked 18+ will show in the left pane as "(18+ content)" even with "click to see 18+ posts" unchecked and "include 18+ posts in tag searches and bookmarked tags by default" checked.
plum panda
All posts marked 18+ will show in the left pane as "(18+ content)" even with "click to see 18+ posts" unchecked and "include 18+ posts in tag searches and bookmarked tags by default" checked.