Because that is his initials, Brandon Anderson Margera | B.A.M. | Bam Another story of how he got his name, a family member called him Bam coz he was always running into things.
I think the name of his road is hickory hill rd. or if you have Google earth then just go on Google and type in where is bam margera's house on Google earth? and one of the optins should say virtual...