If you want to get really, really technical, then you could say I have, but no I don't and haven't and I'm over the drinking age. I considered taking a drink the day before my 21st just for kicks and go "woo drinking illegally!!! k done" but I didn't. Generally I don't care if people do or how much unless it directly interferes with me, which it rarely does.
I will say this to all these people saying "never have, never will." You never know what will happen and what might change your mind. It may even just be curiosity. By the end of my four years at college, every single person I knew who at one point didn't drink (for various reasons) had at least tried drinking for a while (also for various reasons). If it wasn't for some unpleasant circumstances during my freshman year, I'd probably at least tried it out too.