Re:I guess accuracy is too much to hope for (Score 1)

Actually, the pop-up "opt-out" box appears for each new site that tries to send info to your profile. So even if you have opted out of site A, site B will still post your transaction if you miss the 20 second window. You can't do a blanket opt out for all external sites.

I guess actually looking before responding to a news article would have been just too hard.