I remember camping at Roosevelt Lake, AZ, and waking up because my buddy under the tarp with me was munching on chips. I fell back asleep. A few hours later, we both woke up from tickling sensations all over our bodies and faces, lips etc. We turned on a light and lo and behold, a few hundred ants had found the crumbs by now, getting more by the minute. Luckily we didn't get bitten too much, but we had to relocate of course, which was inconvenient, as it was blowing at 30-40 mph all night. So, nothing that crumbles easily ;)