Invite for all physicists to answer this! Please!?

Billy head is wrong. A black hole can have charge as well as angular momentum. As you should probably know, a black hole is a bunch of m (usually on the order of millions of solar mes or more). And as you probably know most m has charge (protons have positive, electrons have negative). The m in the black hole can still cause a gravitational influence on objects near it. In the same way, the charge of the m in the black hole can still give an overall charge to the black hole and affect objects around the black hole. The only requirement is that there should be more of one charge in the black hole than the other. If there are just as many positively charged particles as negatively charged particles, then they'll cancel each other out and the black hole will be neutral. If there are more electrons for some reason or another, then it'll be negative and the same is true about protons. I wouldn't say that a black hole is inclined to be either positively or negatively charged. It just all depends on what goes into it. Most likely though, it will be either near or at neutral. I hope that helps.