A serial graffiti vandal described as “a total loser” was spared prison Monday and instead placed on probation and ordered to spend 1,000 hours cleaning up his and others’ graffiti.Erie County Court Judge Sheila A. DiTullio said she could not understand what motivated 26-year-old Richard Whitefield of Grand Island to deface properties in Buffalo with his “bcuz” tag.“You had the audacity to deface and paint and dirty up our city,” DiTullio told him.