Mark Merenda gives some great advice on law firm taglines, and then shares this story:

It put me in mind of the — much shorter — tag line of a young attorney whom I met at a NAELA event at Hilton Head Island, S. C. in May, 2004. His business card read (with a change of names to protect the guilty): Joe Jones, attorney at law, N.A.A. 

I asked what the N.A.A. designation stood for. He said, "Not An A**hole."