Yeah, I completely agree that the whole Gateway drug thing is BS. It all depends on someones self control and will power. People will do things they like, but we have the power to control ourselves too. It all boils down to that persons self control, and their will always be those that just don't have the willpower of most others. To say it just naturally leads to another thing is crazy. If that's the case then sex, tylenol, fast cars, steak, and just about anything else a person could potentially like could be called a gateway drug since they can lead to other things.
I am friends with tons of stoners that I met in college. None of them are melted into couches, drowning children, or out commiting crimes. In fact, they are all completely normal people with completely normal jobs that did great in school. I have yet to see or hear of someone getting violent or dangerous when high either. When's the last time someone heard about a stoner getting really stoned and beating there wife, getting into a bar fight, or running from the cops. Everyone I know mellows out more than normal if anything, the only thing in danger near them would be the local White Castle or pantry.
I'm completely up for it being legalized, and until the early 1900's it was. It was even a mainstay of our and many other countries economies! Couple that with the fact it is impossible to OD on it and I do not understand how alcohol (I do drink BTW) which is FAR more dangerous to everyone, is legal but pot is not. I think if pot should be illegal, so should alcohol.