And if I am, should I be?
A prescriptivist is essentially someone who adheres to and attempts to enforce language rules as they are today. This is in contrast to a descriptivist, who evidently cares more about how language is used rather than how it should be used.
Those are very course definitions, but I think it captures the spirit.
So I think that this scale, like most, lends itself well to a balance. This is to say that you shouldn’t be too far on either side. That being said, I think my tendency is toward prescriptivism. I don’t mind that as long as I keep in mind that language is in a constant state of flux.