I'm surprised no one has brought up my absolute, all-time favorite creationist tactic: the Quote Mine. Admittedly (with a nod to Mod), it can conceivably be considered a form of the Gish Gallop - and is often used in the same way, albeit written rather than spoken. However, I feel it deserves its own category. It combines the worst type of argument from authority with dishonesty, misrepresentation, and misdirection. I call the tactic "argument by spurious quotation". I did a nice (if I say so myself) dissection of this tactic on this forum a while back (see,
Of Creationists and Quotations), using a then-current creationist poster as an example.
Anyway, my two cents on the topic.