Depends on the size of the pen, and the type of weapon.
They do it all over the country.
That's why I say semantics. Do I think it is sporty? I dunno, I need more information.
When I used to kill 6 either sex deer a year in Hyde county, NC by walking in line with 5 other hunters using 3" mag 00 buck and "jump shooting". Some people thought that was unethical.
They use dogs in NC to hunt deer. Usually a redneck with a swivel chair ing the back of his pick up with a bottle of Jack. They don't care if they shoot the dogs either.
Semantic's that's all. What is the difference between plinking gophers with a 10x scoped .22 .
Just not prepared out right pass judgement based on the information.
I will say this. If he didn't shoot accurately and the bear ate him, I wouldn't feel bad at all.