Did the weed do it?

I'm in a off and on argument persay with some of the people on here about how bad weed is for you and how doing it makes you dumb, stupid, unfocused, or whatever they said. I don't feel that way, you may be a dumb person who smokes weed, but weed didn't...

make you dumb. So tell me people, do you know just one person in your life that has suffered some horrible situation from smoking weed. No other drugs JUST WEED!
And I don't mean like a person was kicked out of their house because they was smoking weed. But real things. For example
robbery
killing
prostitution
violent acts
health problems like cancer (known from smoking weed)
ect ect ect.
See I believe from my own experiences and those that I know, this is not the case for weed. Maybe a lot of other drugs, but not weed.
I think people do dumb things in general, but not because they was under the influence of weed.
I don't want people giving me approval based things, like going to jail because you had weed. Well duh, weed is illegal. Mine question is based on health and violence.
About people who you know that smokes or yourself personally. No stats about weed, that is not what I'm asking for.

Gain wisdom
One

I'm locking this thread due to the personal attacks.