I don't think it should be done very frequently. You can obviously build up a tolerance to weed and will require you to smoke more in order to get the same "high." I notice that it helps me think deeply about things I probably wouldn't think about sober. I'm trying to gain weight, so the munchies you get from smoking help me eat more, which is my goal. I don't think anyone has overdosed from smoking, so it is safe I wouldn't be against it.