Sounds like a reasonable idea, but the rest of the staff needs to check in.
I just want to verify that you know you can uncheck the pins for yourself by just clicking the pin icon. 
So this search shows all the Pinned threads in The Cafe. There seems to be 5, including 2 forum rules. That must be annoying to someone that doesn’t know how to unpin them. The Flash Fiction one & Book Recommendations should probably not be pinned stilled. I’ll probably review and unpin them.
Unpinned and tagged books-writing-myths
I’m investigating why the search is showing the same Forum Rules thread twice, it might indicate two pins on the thread somehow. I’ll eliminate one of them if I can.
So the search just acts weird for Pins. Not worth bumping that up to Site ID.
It looks like with my quick cleaning of Cafe Society only Miscellaneous and Personal Stuff I Must Share and The BBQ Pit are cluttered now.
I updated the title to show what can be learned in this thread.