Hi Mrs. Culombo,
You can tell Mr. L. that he should relax, and resume his walks. The odds of a javeline, (or a group of javelina), actually intentionally charging a human, are extremely slim. Many people have wandered into a group of them, while they were foraging in the brush, and discovered that they will scatter like quail, when spooked. Not only will they run in all directions, (a survival instinct), but they have even been known to run between the legs of someone standing in the way. Occasionally, they will bump against someone's leg, while trying to escape, in such a situation, and so naturally, the bumpee assumes that the animal was charging, and trying to attack, when actually, the poor little critter was just trying to get the hell out of there, as fast as his little legs would allow him, and he probably didn't even see the person standing there.
Their eyesight is extremely poor - no better than Mr. Magoo's, for sure. If you are downwind of them, and move slowly, and freeze anytime one of them looks directly at you, you can sneak right into the middle of them, very easily, even when you are in plain sight of them, the whole time. I have done that myself, many times. If they get a whiff of you, though, they are gone, because they have a very keen sense of smell. Also, the reverse of that works - you can locate javelina in the brush, by smell, long before you can actually see them. They have a musk gland on their rump, just forward of the tail, and stragglers are able to remain aware of the herd's location, while foraging, by "homing in" on that scent.
The kids were probably used to "playing with" javalina.
Luve,
Galahad