On the back of my debit card I used to write “Check ID”. Nobody ever checked. So a while back I came up with an idea to get people to check my ID when I used my card.
It hasn’t worked, but it amuses me.
Ironic story: about three years ago my debit card with “This card is stolen” on the back got stolen. The thieves managed to ring up about $300 worth of purchases using that card.