That's a logical fallasy!

[CapnAwesome]

Erm..pointing out logical fallacies and delineating the flawed reasoning of an argument is a good way to counter-argue.

Except that most of the time there is none of the second bit that you said. When you just point out the logical fallacy and do none of the delineating (as happens most of the time) you are being lazy and stupid. Also it doesn't change that you are using a logical fallacy yourself, the fallacy fallacy.

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Depends.
If they walk in and simply declare, "That's a logical fallacy.", and end it there, then yeah I'd agree with you.

If they say, "That's a logical fallacy, here's why and here's what it really means.", then I'd say that's a valid response.

I agree, in fact I agreed in my post. Unfortunately example B hardly ever happens and example A is rampant on this forum and most others.

I think a third choice is even a better option, which is to point out why the logic is bad, then to actually address any valid points that are made, and counter them using the best logical at your disposal without ever being a smug douche and bringing up logical fallacies. There really is no need other than to show off that you also have access to a wikipedia page. You can point out that someone isn't reasoning well without whining that "Thats a so and so fallacy"

Also I'd really like someone who loves this tactic to address my third point: using a logical fallacy doesn't have much to do with whether or not something is true. Logical fallacies can be used to argue something that is true. So just because something is a logical fallacy doesn't mean that it's true or untrue.