William Bennett , nation 's first `` drug czar , '' believes legal marijuana is bad for society . Bennett says Lady Gaga agrees that pot is addictive and not just a harmless plant . Score: More Americans are admitted to treatment facilities for marijuana use than any other illegal drug . 7 Medical studies find chronic use leads to abnormal brain structure , bad memory . Bennett : Colorado and Washington will come to regret decision to legalize pot for adults .
William Bennett , nation 's first `` drug czar , '' believes legal marijuana is bad for society . Bennett says Lady Gaga agrees that pot is addictive and not just a harmless plant . Score: 7 Medical studies find chronic use leads to abnormal brain structure , bad memory . Bennett : Colorado and Washington will come to regret decision to legalize pot for adults .