I'm deep in a quandary. A couple of days ago, after calling Adblock Plus "the nuclear plug-in," I actually went nuclear. I downloaded the sucker and started using it. I was seduced by Noam Cohen's description of the almost Zenlike sense of peace that flowed through him when he'd outfitted Firefox with the ad-eating add-on: What happens when the advertisements are wiped clean from a Web site? There is a contented feeling similar to what...