Well, even the confidently ignorant occasionally have merits. Not that I can think of any right now, but if paid good money I'd write some ego boosting good copy.
*scrounges for cash*
Uh, what can I get for eight dollars and sixty-seven cents?
MY most annoying argument is the argument from personal stupidity. It goes something like this: I don't understand __________ so that proves goddidit!!!
Do they understand evolution? No! {ah didn't cum frum no ape!}
Do they understand abiogenesis? No! {huh, wut's that?}
Do the understand the second law of thermodynamics they try to throw around? No! {proves goddidit, besides sumpthin can't cum frum nuthin.}
It boils down to "Because I'm stupid, god is real".