I started in 5th grade (11 or 12) and I honestly dont think it was a big issue, as I was too young (poor and naive) to smoke on a regular basis. I didn't start smoking regularly until I was in 8th grade, and didn't start smoking on a daily basis until I was 14 or 15. After I turned 17, I was arrested and forced to quit smoking for a year, which I am now grateful for because it showed me that if I apply myself, I have the ability to break this habit. In fact, once I started smoking after that 1 year peroid, I couldn't stand herb for a good 3 or 4 months and almost shrugged it off for good (but my damn friends kept on passing me bowls and now I'm a fucking daily pothead again). If there is a drug out there that I believe is aceptable to experiment with at an early age, it is pot (if anything).