you are out of the topic . The truth is Laden bought weapons using USD not bitcoin ,so why not ban USD worldwide ? Because it's not money's fault .
+2 bitcents:
If he'd been using bitcoin, he'd have been found sooner. Not to mention bitcoin transactions take technology, modern electronic communication and connectivity... all things he was forbidden to use and forbidding others around him to use. From a practical perspective, this terrorist funding angle is vulnerable to accusations of being a false premise, or worse yet, a theoretical fear floated to grab authority. It is fine to discuss it, but why be surprised when it invites severe criticism? It borders on the trollish.
The example was about the media, public and political reaction to it being done in public, not about bitcoin being usable by terrorists. It'd be very, very bad for bitcoin indeed and it is going to happen.
I apologise for not making that clear enough.