Man, this whole topic has gone out of proportion. Seriously, it's naive and insulting to anyone of any intelligence. Just to be clear, a lot of things are illegal, I repeat, A LOT Of THINGS ARE ILLEGAL. A lot of people violate rules/laws that are so inane some people who work to uphold the law don't even know them. The legality (or otherwise) of your flashcards isn't even the topic anymore anyway, it's just become trolling. In fact, , the whole legal/illegal issue is unworthy of discussion because in most cases, it's a friggin gray area.
PS
To the judgmental people out there... SCREW YOU!!!
PS
To the judgmental people out there... SCREW YOU!!!