Federal Communications Commission chairman Al Sikes stunned an audience of D.C. communications lawyers Tuesday night with what was viewed as a mean-spirited attack on fellow FCC members Andrew Barrett and Sherrie Marshall.Setting for the occasion was the annual dinner of the Federal Communications Bar Assn., where D.C. lawyers honor the FCC chairman for his service. Sikes, who announced his resignation this week and is leaving office Jan. 19, used the occasion to settle scores with past adversaries. His targets included Barrett and Marshall, who along with commissioner Ervin Duggan thwarted Sikes’ bid to gut financial interest and syndication rules last year. Citing Barrett’s alleged poor attendance record at the FCC, Sikes said his fellow commish deserves the “Where’s Waldo Award” since “he has to check in for a visitor’s pass” when he comes to work. Sikes’ remarks were not received well by the crowd, which was expecting a gracious farewell address.