What can we learn from the Xmas Day bombing attempt?

If one is not politically correct, the guy's name and background might have raised some concern for heightened surveillance. It turns out that the guy was on a "watch list" for two years but not on a "no fly" list and, most strangely, there's no third list indicating "heightened surveillance" if flying internationally.
The technology of mixing explosive chemicals on board seems to have advanced past the current transportation protocols' abilities to interdict.It is only blind luck ( or the terrorist's incompetence ) that caused the bomb to detonate prematurely and without fatal consequence. The only technology that might have caught this is full-body scanning which the privacy enthusiasts have been inveighing against, presumably for reasons of modesty and intrusiveness ( one commentator suggested that being blown up was a tad more intrusive!)
A past head of security at Ben Gurion Airport, Rafi Ron, suggested that technology would always advance a stage past whatever surveillance technology is employed for defense and that the only way to maximize safety is through behavioral monitoring ( which the left will immediately condemn as profiling.) His point is that the potential terrorists are being drawn from ranks not restricted to James Bond types and that more amateurish terrorists can be straightforwardly identified by behavior observation protocols combined with intelligent use of databases.