A scientist is one who engages in science, by definition. Therefore, if the creationists or intelligent design advocates utilize flawed methodology, they are not engaging in science. A baker would not bake a cake using a belt sander. There have been numerous posters who claim that certain creationists (Henry Morris and Kent Hovind, for example) report dishonest findings.
However, mainstream science really disagrees not with their findings, but with their conclusions.
Their findings are their conclusions. Neither Morris nor Hovind have ever done any actual research. Instead, both rely on data grazing on others' works trying to lift snippets out of context to support their conclusions.