In the spirit of fairness, here are some apologist arguments that ought to be retired:
“Oh, yeah? Well, the Bible is worse!” When someone points out an anachronism or other problem with the Book of Mormon, occasionally someone points out that similar problems or worse are present in the Bible. For someone who isn’t predisposed to believe the Bible any more than the Book of Mormon, pointing out absurdities in both texts doesn’t exactly shore up belief in either.
“Oh, yeah? Well, prophets in the Bible did way worse things than Joseph Smith ever did!” This one is closely related to the first. In response to accusations against Joseph Smith’s behavior, some apologists are quick to remind that Biblical prophets killed babies, engaged in various sexual escapades, and had obnoxious teens ripped apart by bears. Again, this doesn’t help anyone’s faith in Joseph or the Biblical prophets.
“Not all the discovery has been made.” When someone rightly points out that there is no conclusive New World archaeological evidence for the Book of Mormon, some apologists charge that the critics believe everything that is to be known about Mesoamerica is known, and nothing further will be discovered. This is an obvious strawman, it need not be said, as few critics would ever say something that stupid. But some apologists argue that the Nephite cities just haven’t been discovered yet, and most critics agree that it is certainly possible that some evidence will be discovered; however, it is odd that some apologists have identified what they consider strong candidates for Nephite cities, and yet these cities show no evidence of Nephites, either.
“If you can’t explain how it was done, you can’t opine on whether it happened or not.” This one is especially ridiculous. It’s normally used in the context of the Book of Mormon witnesses, but not always. The gist of it is that, if you don’t have a coherent theory to explain how someone convinced people that they saw plates or angels, you must accept that there really were plates and angels. This is like saying that if you don’t know how a magician does his tricks, you must accept that he really did cut that woman in pieces or make the Empire State Building disappear.