You're not able to register a business line unfortunately. I've tried ours at work as this stuff really gets me revved up we get charity in the morning and sales in the afternoon! Most of the charity is a scam the 2 favourites being a police or fire service publication asking if they can rely on our support again this year. They hope that you'll say yes then they bill you for a false ad closely followed by a debt recovery letter.
Get about 2 calls a day wasting my time boils my piss as its usually when i'm in the middle of something.