When I am running the balls, a requirement to break my focus, in order to pick up a marker and place it near a pocket, is a nuisance that has nothing to do with shooting. I don't know that I would object to the rule if it wasn't abused. If so, those who would protest the shot should be required to question it in advance. Watching someone shoot the eight ball into an obvious pocket, and then scream foul, violates the spirit of the rule, and the game. Trophies and money are no substitute for integrity.
Awards recognize achievement, and rules that negate achievement tarnish the prize.
The rules are in fact there, and it is foolish not to use every device available to win. After all, the end justifies the means. Excuse me, but whether or not to use the rule is not the point. The vulnerability of the rule to abuse, as it stands now, is the point. I believe the rule should be amended to better reflect its purpose.