I'm not sure that's alcohol acting as a stimulant so much as alcohol removing mental barriers that prevent people from acting in a certain way. The depressant effect in fact helps to moderate the worst impulses for most people. Which is why drinks like Four Loco that combine a stimulant with alcohol end up being more dangerous than expected. Not only do you lose your "that's a dumb idea, I shouldn't do it" part of your brain, but you also have the energy to act on the impulse.