Originally Posted by
B747-437B
No, I wouldn't go that far. There are a number of "discreet" stamps and markings that are used by countries such as the USA, Canada, UK, Schengen states, etc.. to denote visa refusals and/or denied admissions. These are pretty well known in the community of people that deal with these things.
The last time I entered Korea, I had someone in training at immigration. She made a mistake with the stamp, stamped it 'VOID' then did another (normal) stamp on another page.
Would the void stamp cause me problems later on?