The playground bully has grown up and gotten a job.  Workplace bullying, which can include everything from belittling comments to excluding someone from an important meeting, may be tougher on employees than sexual harassment, according to new research.The findings, presented this week at the Seventh International Conference on Work, Stress and Health, highlight the difficult problem of workplace aggression. Most workplaces are sensitive to complaints of sexual harassment, and employees with complaints about harassment have avenues to seek help. Workplace aggression, however, isn’t illegal and victims often must fend for themselves, said lead author M. Sandy Hershcovis of the University of Manitoba.