I don't know about fucking up a developing brain...
I tried pot for the first time when I was twelve, but only smoke it like 4 time between then and about two monthes ago. I now smoke it daily, and generally function better than was I did not consistently smoking. And I am more calm in social situations as well.
Although my typing certainly hasn't improved (misspelled like ten words, had to go back and fix them, haha.) Lmfao.