While I wholly agree that nobody is owed a job, the reality is that these pilots -who are not screened enough- are already flying united customers in to many of the same airports.
If you don't want to hire an ug-o, fine, but the vast majority objectively pass the smell test. Years of moving United pax without a blemish to me seems to reveal more about a person than a day or two with HR.
But hell with it all.