The problem with alcohol is is leads to poor eating habits, and lack of motivation to work out. At least it does for me. Plus even at 80 calories per shot of vodka, if I mixed it with diet something I'm still going to end up having like at least 6 shots worth of vodka which is almost 500 calories, which is the calorie deficit I'm going for each day.
Also, not sure if 8man understands how diets work.