Is drinking once every month or two really such a bad thing?

I will admit that during my college years from ages 20-23 I drank a lot but I have slowed down latelv Now that I'm 26. I had to move back with my mom for awhile and she is controlling my life. She hides my keys from me and even my money sometimes. All she talks about is how bad drinking is around me. She even searches my room, car, everything sometimes.. She freaks out when she finds even a beer in my room and crys about it like I'm hurting her or something. Is drinking every once in a while maybe even getting a little drunk such a bad thing?? I don't think it is.