Traveling with youngsters is no easy feat, especially when mama is the only adult in her party. Though the time on board is usually short, a screaming infant and scowling travelers in a cramped space can make it seem like an eternity. When all of the words of travel wisdom have failed, fellow flyers often make their displeasure known with less than complimentary comments. Though we find most jet-setters to be more kind than not, here are some of the toughest zingers we've heard. What's the worst you've gotten?