It's not that scary.

The thing is a lot of people exaggerate the effects of marijuana to being this wholly disorienting experience. In truth, it just makes everything seem hilarious and almost every food combination a scientific discovery. Moreover, unlike alcohol where you feel empowered (i.e. go out and drive), it more or less gives you a "not right now" feeling and you stay put.

That being said, there will always be unintelligent misinformed people who take it too far. Don't let it frighten you.