Terrorism is easy...
...which is why I remain utterly unconvinced that it exists, at least in the form we're having blasted at us by the government all the time.
If there really were organized cells of secret agent grade terrorists out there - as opposed to a tiny handful of disaffected radicals with delusions of martyrdom - we'd be seeing hundreds of deaths a week, but as it stands large scale attacks like occurred in Paris last year are crazy, astonishingly rare.
Oh, and did those people use sophisticated technological solutions to kill people? No. They bought some cheap assault weapons and shot up some crowded places. That's trivial to do. Basically any idiot can do that, and even that involved actually getting hold of guns, which is at least moderately hard this side of the pond. Think how much damage you could do simply by deliberately driving a few cars off of motorway bridges into the traffic below. That's a guaranteed death toll - not to mention the economic damage done by closing the motorways - and all you need to pull that off is a copy of autotrader and 500 quid for a 15 year old banger.
Seriously, terrorism is easy. Given that we don't have bodies piling up in the streets practically daily, we clearly don't need more laws to protect ourselves from people who might do those sorts of things because either they don't exist, or the laws we have are already sufficient to catch them before they kill anyone the vast majority of the time.