Well, marijuana is still illegal in all states, because it is illegal federally still. Regardless of states jumping ahead and declaring legality by state, the federal law overrules. Not to mention that any legal marijuana in the future will be controlled production and medicinal use only. Marijuana can possibility detected in blood tests and urine for up to 20 days or more after use, but one report implied her levels were not just traces, which would indicate recent use, and of course if it was in her system, then it would affect her behavior. Marijuana can increase heart rate nearly twice of normal, cause low blood pressure and liver problems. It is also linked to mental health issues such as depression, paranoia, suicidal thoughts, and anxiety. Marijuana significantly impairs judgment, reaction time, and muscle coordination. The heavier the use, the greater the risk of these conditions, and with someone who is already mentally ill, it would exacerbate those conditions. It is the number one illegal drug found in the blood of drivers involved in accidents, and studies show it doubles the risk of accident. It is illegal, in all 50 states, to drive under the influence of marijuana, which means any at all. So the limits are that it is not allowed at all, and completely illegal. And, I'm guessing that many people are proud of the fact they smoke this weed, but there are real reasons to not.;-)