My point is that they are not exempt from such sins. Scientists are not Christs; ie. they are not sinless. They are not immune from, nor are they above, the pressures of the unruly crowd (think Politics and Pontius Pilot).
Certainly scientists individually are not immune to such things. They are, after all, just like normal people. Examples of fruad, duplicity, lying, honest mistakes and bias are well-known.
But the question is not are individual scientists lying or incompetent when it comes to evolution, but is science as a whole? Science has developed a number of methods to weed out inaccuracies, whether they be honest or dishonest. Peer-review and replicability are two of the most important ones.
Thus, when discussing the question raised in the OP, don't read it as asking about individual scientists, read it as asking about ALL scientists, as a body.
Those who would sacrifice an essential liberty for a temporary security will lose both, and deserve neither. -- Benjamin Franklin