If I&#x27;ve opted out of having my details passed on to third parties, I only have to opt out of receiving communications <i>once</i>.<p>And since they&#x27;re also not allowed to <i>give</i> the data away and can get into trouble for allowing it to be stolen or accidentally shared, my name and personal details are also somewhat less likely to crop up in an embarrassing public &quot;people who subscribe to this service&quot; list...