Hi,
An interesting thought.
Against.
1) It does not happen to my Google Mail ID (Google run a Jabber server)
2) It does not happen to my Jabber Me. account.
3) Nor my Jabber.org account.
4) nor my redhotChillipepper one. (I use this one so infrequently I probably have the name wrong but you get the picture)
For.
1) Facebook's own document that states it's anon standard implementation.
To Quote
Limitations
Facebook Chat should be compatible with every XMPP client, but is not a full XMPP server. It should be thought of as a proxy into the world of Facebook Chat on www.facebook.com. As a result, it has several behaviours that differ slightly from what you would expect from a traditional XMPP service:
- Your client cannot send or receive HTML messages
- Because roster items and presence subscriptions are based on the user's Facebook friends, they cannot be created or deleted using the standard XMPP mechanisms.
- Facebook Chat is terse when sending updates for new friends, because the negotiation happens outside of XMPP. Future versions of Facebook Chat may be more conformant.
- The user's own Jabber ID (JID) is different from the Jabber ID that their contacts will see because the translation is done internally.
- Arbitrary IQ stanzas cannot be passed between clients.
- Presence probes do not currently work.
- Non-SASL authentication with the
jabber:iq:auth
namespace as described in XEP-0078 is not currently supported.
- The XML parser does not yet fully handle XML namespaces. Please stick to the same style as the examples in XMPP RFCs 3920 and 3921 when using XML namespaces.
As you can see from the items I have Highlighted there are several potentional issue arround the Names and Jabber ID.
The line about future versions possibly being more conformant may be the key to this.
The Jabber ID (JID) which is issued by a Jabber server is not normally changed in to anything else by the server in question.
Some do make use of Address Cards and Nicknames that can supply the Buddies that see on line with extra info (most of which Messages and iChat don't even look for) but they do need to be features that are "turned On" for that particular server.
In this document Facebook seem to be saying they will broadcast something that they call your Jabber ID that is not the JID in XMPP terms.
8:34 PM Wednesday; August 14, 2013
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