Ah, not really... topic subscriptions are considered (in my opinion) user private data, and that is not shared by default.
You could instruct your users to adjust their settings if they are being notified about a specific topic too often:
The bookmarks feature is handy but it's kinda buried in the user profile. If I want to see my own bookmarks, it's 4 clicks.
To solve this I'd like to provide a link in the navigation bar or in a widget to the current user's bookmarks. Is there a way to do this?
Yes create a navigation item and set it's route to