Yeah, a little drinking will not hurt you - but once you get to the point where you start dancing with the lamp shade on your head, then you might want to cut back a little.
By the time you are dancing with a lamp shade on your head....it is already too late.
Everyone has to know their own limitations and act accordingly. If someone has a problem with alcohol (even slight), they should abstain from drinking at all. My opinions are prejudiced from having lived with an alcoholic for most of my life. It doesn't help that I am allergic to alcohol and therefore can't drink myself. I used to be the designated driver for everyone, until I got tired of hanging around with drunk people.
If you are at all worried about something you might do or say while under the influence, then don't drink.