Well? What do you think?

Those black bollards, with yellow stripes around the top, that go up and down.

http://www.ttmltd.freeserve.co.uk/images/pf21.gif

Do you think that's enough to stop a truck filled with explosives travelling towards it at high speeds? The goverment seems to think so... don't know why.

http://www.i-am-bored.com/bored_link.cfm?link_id=18986