"What I found more worrying is the gaol time for those viewing "terrorist material" on-line."
Here are some things that have been used in terrorist attacks. Each of them can, therefore, be considered to be "terrorist material". Presumably reading this post is an act of sedition.
Pressure Cookers; Nails; Screws; Nuts; Bolts; Ball Bearings; Flour; Fertiliser; Diesel Oil; Motor Vehicles; Knives; Batteries; Countdown Timers; Shopping Bags; Plastic Buckets; Mobile Phones.
Lots of others but I don't want to be accused of writing a Terrorist Cookbook.