This is a big problem with only pilots performing walk arounds. We once had a pilot tell an an engineer that he heard a loud "snapping" sound associated with the gear, but said he didnt worry, and wanted to depart. The engineer straight away said that he wasnt going anywhere, and they towed it down the hangar. Much to the disgust of the pilot and the company I think. Anyway, after investigation, the walking beam was found to be cracked. It is obvious what the consequences would be if the engineer just said ok, and left it at that.
There is nothing more annoying than pilots, and I dont mean all before you jump down my throat, but there are many out there who beliieve that they know what to look for and know what they are doing. That is why you have engineers. Tell them if there are strange noises, and we must put safety first, while still taking into account time restraints, but safety first!!
The pilots in our old company used to get told to "ask an engineer" if they were in any doubt.