I haven't seen a deaf peddler selling the fingerspelling alphabet cards since I was a child, and that was a LONG time ago. When I was 7 or 8, there was a deaf gentleman who would supplement his income by selling these cards. My parents had owned a deli, and he would come in every so often. I do know, however, that he was actually deaf, and was married with a deaf wife and 3 children, 2 of whom were deaf.
The scammers need to be prosecuted. The selling of these alphabet cards is a very real part of Deaf history. It is a testiment to the resilience of the deaf and to their collective determination to be self supporting and independent despite the barriers that have been placed in their way by hearing society.