I'm worried about my browsing to be tracked across the entire internet for the purposes of marketers to "enrich" my profile... just to sell me more and to sell that data to third-parties who can make all sorts of decisions based on a made up story about who I am, my preferences, my values and whatnot.
there's a reason I don't walk around naked either. it wouldn't hurt me, but I don't need that kind of exposure for no upside