The brain tumor was removed...and the public behavior was unchanged.
http://valleywag.gawker.com/rap-genius-frontman-blames-brain...
http://valleywag.gawker.com/rap-genius-frontman-blames-brain...
We don't know nearly enough about the brain to argue that the removal must restore the previous personality.
It's the same reason that we shouldn't let blind people fly commercial airliners. Flying requires vision. Running a company requires good judgement.
Says who? It's not like the company is Disney. For some companies such antics are par for the course (e.g a gangsta rap record company).
"Unaccetable" for running a company with profit, or "unaccptable" for your moral code? Because the former sure ain't the case.