Fake JEM's are starting to get up there with fake Les Pauls in terms of numbers, and they're starting to get better at it too, they're looking more and more like the real thing.
That warning is pretty useless though, it doesnt tell you how to spot fakes. There are a lot of sites out there with really good info on how to spon them though.
I have what I believe is a fake ibanez actually. It is an Ibanez EX160. I did some research and the serial number is compatiable with fake ibanez guitars.
I'm the musical equivalent of driving a Sherman tank to work.