Hey man. You give good advice, this isn´t about being ashamed about a stutter or making a big deal out of it. When you s-t-u-tter like this there is no need for a card (ofc u still can) as people can easily realise you have a stutter. Lots of people don´t know about blocks though. Here, they get confused when you block as they don´t know whats going on. Ive even had good friends who know that I stutter be like ´´Dude whats going on´´ when I have a block. The card prevents the confusion and lets me feel more at ease, so I don´t have to rush to the ´´btw I have a stutter´´ sentence, which I block on as well.