I'm guessing this is going to be a pain for physical players... especially when combined with retreat...
So there are cases, like dimension ripper, when your opponent takes one of your cards. If that player has the same card in his hand, SE keeps track of the original owner when retreat is used. You can't really do this in real life. If you mark the card, then obviously the person will know when to use retreat to get the card back into their hand.
Just food for thought.
Bookmarks