Eat fresh pineapple to your heart's content; the tough skin protects the fruit from any pesticide residue. Give the pineapple a good rinse before cutting; otherwise, residue can follow the knife into the fruit.
Although it's tempting, this is one fruit you won't want to choose with a strong, sweet smell. This usually means it's overripe and fermenting. Avoid any soft spots or damage to the rind. Store in the refrigerator crisper.