Facebook locked me out from Facebook chatting, because they found my IP-address weird

Once I logged into Facebook on their web-site again, they confronted me with "weird" activities on my account with them, showing me a log-in attempt from Gouadeloupe. For them Gouadeloupe and Martinique seem to have something in common. After I confirmed that as OK, they also let me log into their XMPP style chatting again. That's quite amusing.