1 - Turks.
2 - not hacked, but defaced
3 - not the host fault, but yours
4 - Why ? because they can since you let them.
5 - How ? by overwriting or modifying your config.php file of some script, or if your folders are set to a high permission ( 777 or 755 )
6 - Are you alone ? NO!
party with some of your collegues:
http://www.zone-h.org/component/opti...page/Itemid,1/