BarbiesBoyfriend,
I think the earlier posts make it clear that while in principle it is entirely possible to make a liquid bomb, in a practical sense it's an absurdly low risk on a commercial flight compared to many others. On a risk/reward basis it doesn't hold up = not worth the effort and disturbance. Snag is none of the public, press or politicians understand risk.
Or they wouldn't say things like " Safety is paramount". Nope, it's not, it's a matter of economics. Or of emotion. Every time.
We humans ain't good at logic. (try Dan Gardner on " The Science & Politics of Fear". Interesting book.)
FWIW I very much agree with your comment about terrorists and terrorism. Perspective makes a big difference.