There are many forms of cyberterrorism ranging from using the internet to conduct pre-operational surveillance/intelligence gathering to communicating operational plans to using the web to sabotage our critical infrastructure/banking systems, pys ops, and recruitment.
Although there have been quantum leaps in the fight against cyberterrorism, there is still a lot of work that needs to be done.
Just this past week the Pentagon was hit with a virus.http://www.infoworld.com/news/feeds/08/11/21/Old-worm-infects-Department-of-Defense-computers.html?source=gs
Yes, there is a lot that can be done at the macro level e.g., better international laws, international treaties, information sharing, enforcement, etc. All of this is beyond our control and influence.
I am by far no computer expert! However, I believe the first step is to develop cost effective security programs, which includes expert oversight/guidance. Most IT folks are pretty well versed in installing software, networking, and fixing a computer on the fritz. How many proactively monitor their systems to identify potential attacks, probes, etc.
In addition, people need to be educated. The average Joe has no idea what is going on. How long did it take for YouTube to ban terrorism videos? Most people have no idea how the internet around the world is facilitating the spread terrorism.
The National Intelligence Council just released an unclassified report called, Global Trends 2025: A Transformed World. The report is an interesting read. Just conduct a word search (cyber, internet, web) of the report for a quick synopsis.http://www.dni.gov/nic/PDF_2025/2025_Global_Trends_Final_Report.pdf
Cyberterrorism is not going away anytime soon.