[otherusername2]

The whole shrugging off and downplaying of issues like this are exactly the reason the internet is complete shit when it comes to security.

Why, after all the exploits, insecure software and bad decisions, can people still not see that they can't anticipate everything?

For instance, here's a scenerio I can easily envision: The NSA strongarms Ebay into letting them sniff TCP connections to their favicon, combines the TCP fingerprint with the browser useragent to uniquely identify you from perhaps millions of other users. Geolocate your IP to determine where you are and bam they know all about you they need to know. Tin-foil hat? Of course. Plausible? Totally. Doable? Absolutely. They don't need to be perfect, just good enough.