Almost all the philosophical blogs—theist and atheist, smart and dumb—I read with any regularity have a tendency to philosophical and intellectual sloppiness, and this tendency drives me up the wall.
I'm not talking about trivial mistakes of spelling, grammar or punctuation. I'm talking about the tendency to assume the truth of one's basic premises without argument or substantiation, to make broad, unsubstantiated generalizations about intellectual topics, and glossing over controversial enthymemes.
Scientists can get away with this kind of sloppiness, because there's an enormous canon of uncontroversial and widely-accepted work. Scientists don't have to re-argue or even mention first principles for every argument or discussion because their first principles are well-defined and univocal.
Philosophers lack this sort of canonical basis. Absolutely nothing is uncontroversially accepted as a first principle. Indeed, philosophy is in no small part devoted to the study of first principles. Even when not devoted to first principles, whatever basis is being assumed needs always to explicitly mentioned. If you're evaluating some ethical question on a Kantian basis, then you need to say that you're referencing Kant.
I have worked most of my life as a profession engineer. Precision, clarity, and an explicit recognition of underlying assumptions is a professional requirement. Computers simply do not recognize even the tiniest bit of imprecision or ambiguity. Maybe it's just me, but I find vagueness, imprecision, ambiguity and hidden assumptions in philosophy just as outrageous as I do in engineering or science.
To a certain extent, professional academic philosophy is devoted to topics that I really don't care about, among them argument for argument's sake and a detailed examination of various works that form the academic philosophical canon. Because I'm not interested in these topics as topics, I just don't comment on them. Say what you will about Kant; I've not made a sufficiently detailed study of his work to make any sort of meaningful comment about what he really says or means. I have my opinions about these writers (chiefly that they—unlike scientists writing about quantum mechanics—are not sufficiently clear to take at face value) but I freely admit my opinions are relatively uninformed. So be it. But I do know that the philosophical canon is a multi-voiced literary canon, not a univocal scientific canon.
Just because you know a lot about Kant or Hume or Aquinas doesn't necessarily mean that you know anything at all about philosophy. Most do, but many do not. And even a PhD in philosophy and a tenured professorship does not exempt you from showing your philosophical argument all the way down to the "bare metal"; as opposed to way that a scientific PhD does provide such an exemption by virtue of a univocal canon.
I've seen this tendency all too many times. A professor will make some dodgy philosophical argument, I'll criticize it, and I'll be slapped down for lack of credentials. It's infuriating. I'll take it from a scientist (or a philosophy professor talking about the canon), because I know they know quite a lot that I know I don't know. But I won't take it from a philosopher talking about philosophy. I'm not impressed by philosophical credentials: It's just not that hard to think logically and sensibly; one does not need the better part of a decade's worth of academic study to understand a syllogism.
Not every PhD and philosophy professor does this, and I'm not drawing any broad conclusions. I'm just discussing something that some people do that pisses me off.