Both are dangerous, both have short term and long term effects. Marijuana is worse health-wise, unless someone is drinking very heavily (BEYOND two drinks/day). Then I'd say it is about equal or eventually, the alcohol is worse if we are talking about toxic levels of drinking
The whole weed fad and recreation is great for stoners, prices came way down due to influxes of b-c grade on the underground market.
I don't care what others do honestly...it is just innocent ribbing. But those who are flippant about either ones risks are pretty silly