Have you seen the new sunscreen arms race?

It used to be that buying sunscreen was a boring affair, an annual visit to that particular store aisle on your way to the first summer barbecue. But now, there's an arms race in sunscreen reminiscent of the blade-count battle in men's disposable razors (a race that the Onion eerily predicted).  SPF 30?  It's for chumps.  How about Neutrogena's SPF 100+?

Of course, it's all marketing shill:

The difference in UVB protection between an SPF 100 and SPF 50 is marginal. Far from offering double the blockage, SPF 100 blocks 99 percent of UVB rays, while SPF 50 blocks 98 percent. (SPF 30, that old-timer, holds its own, deflecting 96.7 percent).