Ohh no, that happens a lot
But I also think that its important for people to know the difference between personal attacks and simply attacking someones view.
I have some long discussions going on with dear Trailblazer and will often use words like "make no sense", "incompetent" etc. But that is not personal against her, I just really disagree with her views. I don't think insults or personal attacks on anyone is acceptable, but someones views are not holy.
I haven't really experienced a lot of what I would refer to as personal attacks and should they occur, I would probably just ignore them and not spend time on it. These things happens online and should not really be taken all that serious. Think about it, some random person you haven't met, saying something about you, which they know nothing about, why even bother taking that serious
So sticking with peoples arguments seems more interesting to me anyway, at least.