I agree it is dumb but I find it hilarious when some Americans act shocked and see it as an "attack on peopels fredoms" ..
well,have you seen this site?
http://www.dumblaws.com/laws/united-states
lots and lots of dumb laws in USA. I'm willing to bet USA (its states etc)has the highest amount of dumb laws from any developed country.
just searching for "dumb laws usa" in google gets you millions of results..
here is more condensed:
http://tjshome.com/dumblaws.php
I cant say all are true but even if 10% is it is dumb beyond reason..