...It could of course be that some of the components shown in "Datalore" are not removable after first installed. We know Data's right arm can be detached with ease, although this is only seen when he is on shutdown mode. We also know his head can operate independently to a degree, but this is only seen when catastrophic damage has severed the head from the body. Nothing indicates the ears could be routinely dismounted (in the style of the eye implant of a certain Narn ambassador and pervert-in-residence) or even torn out of the skull with power tools.
And it's not as if our heroes trust Lore in the episode, or even buy his Data imitation. Quite to the contrary, they are suspicious of basically every move he makes, and always assign a chaperon to him. It just turns out that Worf isn't good enough a chaperon in this case.
As for not listening to Wesley... That's something of a given. All he ever does is naïvely spell out the unvoiced suspicions of the grown-up crew, thereby unnecessarily risking alerting Lore to these doubts.
Timo Saloniemi