Grimaldi said that because all creatures on Earth are classified according to their physical features, and it is this that scientists use to study how evolution has created or shaped the entire history of life, no specimens in amber should be tampered with unless they are quite common and others of the same species, era and location can be found to replace them. Grimaldi has criticized the extraction work of scientists such as Poinar, pointing out that the weevil from Lebanon was probably the only one of its kind. Grimaldi said his approach is becoming more common in science, from archaeology to paleontology, in which large parts of discovery sites are left unexcavated, so as not to destroy things that might be useful to, or better extracted and preserved by, future scientists. All amber fossils, Grimaldi says, should be coded, as at the American Museum of Natural History, according to rarity, and only those with more than two or three duplicates should be subjected to DNA extraction. Poinar agrees that very little damage can be tolerated, but he said he and others have developed techniques to enter specimens in amber through a tiny hole, use a needle to extract tissue, and reseal the hole.
Quotes are from media sources.