Warties will get to about 300 lbs (that would be a huge one) . They are survivors, native land has lions, leopards, hyenas......no end to the large predators.
They don't interbreed with feral hogs. What would keep them in check is they breed once a year and have a long gestation, small litters.
I enjoyed hunting warties where they belong, a big one is an impressive trophy. They deserve more respect than just target practice.
As for warthog in Texas I don't have the answer. As with any non indigenous species no good is going to come from them. It would be "cool" to seen them but they are eating someone who belongs here dinner.