Excellent Signage

Brian Krebs has a photo (sent in to him by a reader) of something one credit union is doing to help inform people about fraud.  Most of this stuff is pretty obvious, but unfortunately, it hits enough people that this kind of education is vital.

Depressing follow-up question:  of the people who most desperately need this information, how many will read and understand this sign?  Of those people, how many will disregard the information, figuring that their particular scam is legit?