Originally Posted by
GUWonder
Wrong, what I said is still terrorism.
Terrorism committed to point the finger at someone else is one of many such examples.
Terrorism committed to accomplish political objectives doesn't always require finger pointing or claiming responsibility either. Another such example.

Seems that others disagree
http://www.globalterrorism101.com/UTDefinition.html
Originally Posted by World Conflict Quarterly
The FBI defines terrorism as
the unlawful use of force or violence against persons or property to intimidate or coerce a government, the civilian population, or any segment thereof, in furtherance of political or social objectives.
Pretty difficult to intimidate or coerce by committing these acts anonymously, but I guess you're the expert here.