As a LAME I'd rather have any defect written up and recorded. If its a fault I'll fix it, if it isn't I'll note it. It may be a bit embarrassing if the engineer points out that what you thought was a defect was in fact normal operation, but at least you might learn about flying from that. Remember, writing things in the Tech Log might very well cost you a job [but only with a less than reputable operator], not writing them in is a violation of the Air Navigation Order that could cost you your licence.
In any case, surely you prefer to fly serviceable machines? Its your @rse its strapped to, not mine.
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Through difficulties to the cinema