They should make a post about it in the main page while they settle this. If such information can be blocked from access, they could do it, otherwise they should just let everyone know that if they're buying un-id'ed items they could get scammed.
rofl, this has been around for... well awhile. Just someone found out and started spreading it. it's the "WARNING" threads that started filling people in lol.
just buy from people you trust
"A while" = launch of D3. Probably worked in beta too, but I didn't notice it until a little bit after launch when I accidentally broke an item. I didn't learn about all the actual item stats until today, though. (I guess people used Mooege to get a list of all the affixes' values, which is something I haven't messed with, at all.)