BEST PUBLIC MELTDOWN Miami City Commissioner Jeffery Allen Public service is not rocket science. Once in office, you meet with constituents, declaim on their behalf, avoid prostitutes and smoking crack with undercover cops, and chances are you'll do okay. It's also not a bad idea to speak cordially with the press and to avoid brawls. So what does Commissioner Jeffery Allen do after about three months in office? He has a chest-butting match with his chief of staff right in front of city hall, in plain view of several observers. The aide, Milton Vickers, warned he would press charges if Allen touched him, and taking the high road, the commissioner threatened to do the same, according to witnesses. At a community meeting the next morning, Allen moved quickly to modify his hothead image. When a reporter asked about him the fracas, the commissioner spun around and called her "libelous" and "slanderous," loudly announced that his entire staff was now banned from speaking with her, and then stomped off.