Predators get stronger and prey gets sneakier, predators get smarter and prey gets faster, and so on, to produce the diversity and dynamism of the natural world today.
Even sneakier, if surfers do in fact click on one of the advertising banners hoping to go to that site, they are sometimes returned to the original site instead.
While some thefts come from stolen wallets containing Social Security cards and the like, thieves also are filching Social Security numbers in sneakier ways, such as from health-care or financial databases.