Maybe this is a bit off topic, but does anyone know the legal footing of having a business with another businesses name in it? For instance, this tool uses the word "YouTube" in its name, though it is used as only a part of it, and it is not a competitor. I've always wondered how this works.
Not sure about YouTube but WordPress does not allow the use of the name. WP in your (e.g.) domain name is ok. WordPress is not. I'd imagine it's very similar for others. Often a company will pursue a violation if only to be consistent in showing the courts they actively defend their copy right.
They may not like it, but they don't have the power to disallow you from using their name to refer to them. That's allowed.