There's always a list. Sometimes it's in people's heads, sometimes it's on paper. Sometimes it's in a computer. In the UK, people can ask to see any informatio

There's always a list. Sometimes it's in people's heads, sometimes it's on paper. Sometimes it's in a computer. In the UK, people can ask to see any information on them stored on a computer. Which is why blacklists are done on cardfile even today.