It is nothing about "we" and all about "you". The art of dealing with comments on your blog is a personal decision you do not make "once for all". It is up to your mood, your generosity to overlook bad behavior or to try to correct it. If you are having a good flow, get nice and supportive or in a good way challenging comments than some spamming comments won't bother you. If you for some reason are disturbed you'll react on how you feel in that second. In my view there is no "general treatment" but only a reaction you want yourself to be visible (or not).
Sometimes you care, sometimes not. If you would bind yourself to a certain strict way of dealing you'll lose easiness. That is how I see it.