I've been trudging through season 3, ugh, and one particular moment had me shocked. Kirk orders two security guards down to the planet. He directs the transporter chief to beam them down and to retrieve the other security guards. What ends up happening is that the two guys were beamed into open space because the ship had left orbit. Kirk neglects a) confirming they are still in orbit, b) confirming the beaming coordinates, c) preparing the two guys on the planet for transport and d) safeguarding the lives of his crew (by directly killing two of them). With negligence like that, I can't fault McCoy, Pulaski and Barclay for hating the transporter.