This is a bit of technology that isn't delved into much in the Star Trek universe. It seems to be used as a plot point more than anything else, but does anyone have any idea how such a device would actually work? What would it's effect be on telepaths? We see it used on Vulcans periodically, and because of their mental disciplines they appear more resistant to it's effects. But because they are also telepaths, wouldn't they be able to "call" for help with someone they are mentally linked to, or does the mind sifter mess with their telepathic abilities? I think this wouldn't have applied to Spock since he didn't have anyone near that he was telepathically close to. But a married couple would have some sort of mental connection, and what about other telepathic races, like Betazoids? I think this idea should have been explored more in the series. If they are going to do a show involving telepathy and mental attacks, they should have delved into the dark side of this as well.