I just can't reconcile Sabin's inability to correctly read the thoughts of anyone in the Drumhead to the apprehension characters like Groppler Zorn and Devinoni Ral to hearing that Troi was Betazoid. Was Betazoid telepathy more a bluff than anything else? Used for advantage much like the legend of Zakdorn invincibility? The only truly gifted telepaths we saw in TNG were Lwaxana Troi and telepathic superfreak Tam Elbrun. However what if telepathic ability was related to royal bloodlines? Spock another gifted telepath could be also argued to have some high standing given what happened in Amok Time. Then again Tuvok and T'Pol were fairly competent in the mental arts. Sabin must have been unable to read thoughts well, for the only other explaination is that he was a hardcore McCarthyite, something that would not seem possible being born on a telepathic planet of no secrets. Also relevant to the conversation is whether telepathy is active and evident to the recipent as in the Vulcan method(which would allow for mental defenses) or simply the observed thoughts picked up from your leaky brain. Gul Dukat laughed off a mind probe attempt by Sakonna, so it is clearly doable.