Round one begins this week. Marijuana activists have amassed enough support to force Marin County District Attorney Paula Kamena into a “recall” vote. (If the measure passes, Kamena will lose her job to a candidate more favorable to the pro-pot crowd.) Her alleged misdeed: harassing marijuana-smoking patients with legal action. The 55-year-old Kamena insists that she has been unfairly targeted by the “medipot” forces. During her 2-1/2-year tenure, Kamena has allowed patients to keep as many as six mature marijuana plants without fear of prosecution. “That means it’s OK for patients to have $30,000 worth of marijuana!” she says, adding that some other D.A.s “find that appalling.” If she loses, those other D.A.s may be next on the political hit list.