If the eggs in the batter have salmonella bacteria in them, it likely wouldn't matter if you had a tiny nibble or the whole batch, you'd probably get sick either way. The vast majority of eggs bought at supermarkets are safe, but there's still a chance of illness. It's kind of a gamble - but it doesn't really stop me. Cookie dough is awesome. (Though if I've really got a hankering for it, I get some Ben+Jerry's Chocolate Chip Cookie Dough ice cream.