Javalinas have gotten a bad rep for years from imaginative stories about their ferocity. In fact, they're very shy & easily frightened. They're also very near sighted. IWhen I was considerably younger I accidentally walked up on a family of them. All I had was a .22 & I'd heard all the tales. I stomped both feet very hard & yelled at the top of my lungs. They took to the brush like they were wearing rocket belts!
The one thing you never want to do is wound one when you're hunting. That thing has a distress cry, & all its kin will come to see what got cousin Juan. Juan has more kin in immediate holler than there are Garcias in the San Antonio phone book, & they come ready for war. If they spot you, they'll come after you--or after anything else thats' injured cousin Juan, which can be a coyote, a bobcat, a mountain lion, or a domestic dog. They turn from shy little critter to a bristle brush with a couple of bowie knives in its mouth.
Believe it or not, javelinas make great pets. There was a lady in Corpus Christi who rescued a baby & raised it in her back yard. It loved to be petted & as long as you came into the yard with a member of the family there was no problem. Several times, though, she reported finding pieces of pants legs & bloodstains on her back fence. One night there was a real commotion in the yard, so her husband got his gun & a flashlight to see what was going on. A prowler was up in a Chinese tallow tree with the pig under it, popping its tusks. They called the police & when they arrived took the watch-hog in the house so the prowler could get down to be arrested.
Texas Ranger Captain Frank Hamer had a pet javelina he called 'Porky,' who lived in his yard in South Austin. Porky wasn't particularly fierce, but he scared the wadding out of a Black guy the Captain hired to do some yard work. He thought Porky was a giant rat & refused to go back into the yard.