1) yes 2) no concrete reason not to. Control it and tax it. Sure there are challenges (law ammemdments for public use, vehicle operation etc) but nothing that cannot be overcome. 3) yes. Recreationally, likely an average of 3-5 times per year over the past 15 years. I will note that this forum is pointing out that most who feel it should remain illegal, have never tried it. Seems like they are just wanting to push their personal beliefs on others. I do not own a gun or smoke cigarettes, but i recognize others' rights to both. 4) As a substance, no. What could be considered a 'gateway' is drug culture. If you hang around with lots of people who do illegal things, you will likely be exposed to more illegal things. Legalizing it will minimize this effect.