J.S.
Those yogurt tubes are so disgusting cold, they must be vile when they're warm. If they're going to be warm for more than a few minutes, then no, they should not be eaten. They should be kept refrigerated and cold before being eaten.
You can get this information from the FDA and CDC. It's readily available all over the internet.
http://stilltasty.com/fooditems/index/18717
http://homecooking.about.com/od/foodstorage/a/yogurtstora...