Same situation, i needed one for work. Worked @ a social media management company...Facebook doesnt like "Fake accounts" so maintaining a real one for work, for the purpose of testing was something you needed to do.

Its a real pain in the ass, mixes personal and work way too much. I had a Facebook account already, and i still do, so i didn't mind too much....but i dislike the left overs its causes (installed apps, pages in my name, app keys in my name etc...although this was just due to poor management of these assets)