One that bothers me is the assertion that the geologic record looks exactly as one would expect if a worldwide flood had occurred. I first saw this claim in the atrocious little book
The Great Dinosaur Mystery and the Bible and have seen it repeated elsewhere. My guess is that those who make such a claim are either wilfully ignorant or flat-out lying about the complex vertical sequences of environments in many places. Especially damning to the claim is the presence of formations that required great lengths of time to form, with supposed flood strata above and below.
So, why is this dishonest? Let us take the author of my old book as an example. If he knows he is spreading a bunch of falsehoods in the name of the Gospel, then he's lying. If he doesn't, then the falsehood is in his claiming to be an authority on the subject, because he knows nearly nothing about the geologic record. Thus, in that case he is still lying to his readers and possibly himself as well.
*sigh*
And to think how much I loved that stupid book as a kid....