I had Becks non alcoholic beer when I wasn't allowed 'real' beer due to health. It tasted a little different but was perfectly acceptable. Real stuff every time, mind you.
That's assuming that the point of drinking beer is always to get drunk, rather than because it tastes nice.
Pointless amount of alcohol. Might as well not bother.
I see no harm in a bottle of beer with dinner. No more than that, though.
I'm sure there are non-alcoholic beers out there, but I'd imagine they taste shite.