I think the point is <img src="i/expressions/face-icon-small-wink.gif" border="0"> , that just because you have smog, doesn't mean that you have an ozone problem going on. And just because the smog isn't as thick as usual, doesn't mean it's a good ozone day. Lots of things apparently go into making it a bad ozone day (temperature inversions, etc.). The ground level ozone problem is worse during the summer (hot days make it worse) and during the hottest part of the day (10:30 to about 3 pm). You can have the same amount of smog morning, noon and night, but the ozone is usually worse in the afternoon. Does that make sense?
Oh, and until this year, ozone alert days didn't phase me one way or the other, (other than a little more worn out, but I contributed that to the heat) but this year I pay for it if I blatently disregard it (like taking my daughter to the playground for a couple of hours in the afternoon- mistake! Next time, we will go in the morning or early afternoon.)
So, it really is about your health, <img src="i/expressions/face-icon-small-wink.gif" border="0"> and not the enviromentalists trying to brainwash us again <img src="i/expressions/face-icon-small-wink.gif" border="0"> . I'm really surprised that your news doesn't make a bigger deal about it.... I'll see if I can find the link again about ozone days and reduced lung function (something about "real world" tests... <img src="i/expressions/face-icon-small-wink.gif" border="0"> ).
I really think that in a city of commuters, that asking people to not drive as much, or gas up between certain hours will make much difference at all (especially here, where our biggest polluters are industrial...if <i>everyone</i> stayed home and didn't drive, grill or mow on ozone alert days, it would only drop ours less than 25%...