Architectural barriers are all the rage since 9/11 (actually, since the OK City bombing). Here’s a summary of the good, bad, and ugly.
Is it all a matter of “fighting the last war”? The main problem is, if you don’t defend against the last war, you end up with the last war again. Assuming there’s value in keeping trucks full of explosive materials away from key buildings, we have to do that. We also have to be doing more, but we have to be doing at least that much.
If the bollards had attractive seating around them, they’d look pretty nifty and be helpful to tourists in addition to their defensive functions.
Better yet – Nice umbrellas over the seating, and outdoor cafe concessions.
Only problem with that is bollards are designed as pass-through barriers for pedestrians (or bikes), and (at least in the example in the article picture) would be less suited to that role if set up with seating and the like. But that’s good OOTB thinking.