Don Rickles, the hollering, bald-headed “Merchant of Venom” whose barrage of barbs upon the meek and the mighty endeared him to audiences and his peers for decades died, Thursday at his home in Los Angeles. He was 90. (AP Photo/Mark J. Terrill, File) By Lynn Elberap Television Writer LOS ANGELES – Don Rickles, the big-mouthed, bald-headed comedian whose verbal assaults endeared him to audiences and peers and made him the acknowledged grandmaster of insult comedy, died Thursday.