diff --git a/doc/special_remotes/bittorrent.mdwn b/doc/special_remotes/bittorrent.mdwn
index 4821acc63c..b9bbff61a8 100644
--- a/doc/special_remotes/bittorrent.mdwn
+++ b/doc/special_remotes/bittorrent.mdwn
@@ -20,3 +20,10 @@ it cannot upload or remove content.
 
 Multi-file torrents are supported; to handle them, `git annex addurl`
 will add a directory containing all the files from the torrent.
+
+It's hard to say if a torrent is healthy enough to let a file be downloaded
+from it, and harder to predict if a torrent will stay healthy. So,
+git-annex takes a cautious approach and when dropping a file, won't
+treat this special remote as one of the required [[copies]]. It's probably
+a good idea to configure git-annex to fully distrust this remote, by
+running `git annex untrust bittorrent`