Hey,
I am in the process of booking a villa at the moment and also received the same warning on around the 8th of january.I have alredy paid most of my groups deposit and am also a bit worried.I also think it would be a GREAT idea,as you said, for ibiza spotlight to have some kind of list of all the legitimate villa rental companies so you can enjoy the buildup to your holidays rather than worry all the way through incase you have been a victim of fraud!!!!