jomaxx - 3:39 pm on Sep 17, 2006 (gmt 0)
The rationale is that the user does not want to see the ads anyway and it lessens the chance of a poor prospect clicking on an ad.
With respect, this explanation does not make any sense. By this logic, Google shouldn't be showing such users any ads at all. IMO it's more likely to be about ad blindness, as Pengi says.