Hi Alex Uk
I for one think they are a great idea. I looked at the one on Bleeding and love the last line
(TV). I see them in the same light as the "make a cup of tea advice", the stop and think first way to go.
I have had first aid training in the RAF and out, different times and courses have reccommended slightly different ways to act. Surely the fact that an aider is doing something other than running around in circles is a plus. If someone was to whip out your card and then think, actually I will do this as I was shown on the course I attended then so well and good. For my way of thinking even if I tell a passer by, look in the top of my first aid kit and follow the guide, its served its purpose.
Carry on with this, no one is forcing us to use them, I for one say thanks