Kind of wish there was a flag in the ID string that basically says, "This user is unlikely to click on your ad, ever. Save your advertising dollars". I have "

Kind of wish there was a flag in the ID string that basically says, "This user is unlikely to click on your ad, ever. Save your advertising dollars". I have "responded" to one GMail ad, ever. It was for tickets for a Pixies show, and I had not known they were touring. But I didn't click on it - I went to ticketmaster.ca and bought some seats for some friends and me. The ad wasn't placed by them, as far as I could tell, but they got the sale on someone else's ad budget. Do many HN folks click on ads?