Currently when a Dropbox Paper document is shared with you it's impossibe to remove yourself from it. Not only this, but all others that the document has been shared with can see your email address. This is a privacy leak.
I accidentally moved a Paper doc into a folder. Didn't realize it was "shared" to me. Realizing my mistake, I tried to move it to another private folder, but was warned "26 people will gain access [to my private folder]". Whoa. Not an option, so I deleted the paper doc.
Next, tried to remove myself from the shared folder to avoid confusion...and... and... got to the ~3 year old thread asking for this feature. Seriously? What possible explanation could exist for this feature not existing already, or not even considered in all that time?