I am not reading most of the HN links, I'm just skimming down through to find the few most interesting looking ones to click on. So, the BuildZoom thing doesn't bother me, it's just one more thing my eye slides past. If all ads were like that, I wouldn't have a problem with ads.
By not looking at them :)
Seriously tho, HN ads aren't intrusive or distracting (usually).