+Remote mentions are delivered using the OStatus protocol.
+This protocol is used by Friendica and GNU Social and several other systems, but is not currently implemented in Diaspora.
+As the OStatus protocol allows this Friendica user can be @-mentioned by users from platforms using this protocol in conversations if the "Enable OStatus support" is activated on the Friendica node.
+These @-mentions wont be blocked, even if there is no relationship between the sender and the receiver of the message.
+
+Friendica makes no distinction between people and forums for the purpose of tagging.
+(Some other networks use !forum to indicate a forum.)