Yes there are irresponsible pitbull owners , and there are many , like me , that have wonderful dogs, I’ve had 4 , 2 were killed by cobras, and still have 2 of the nicest gentle dogs you could meet. They are not allowed to roam free though, and are well trained, something most Thais are too lazy to do.
The people who “ASSume” that every pitbull is a killing machine, should stop making an ass of themselves!