Can we still talk about WTF moments from TOS?
I'd say:
1. Not thinking of using the shuttlecraft to rescue Sulu and the landing party in "Enemy Within" always confused me, even as a little kid watching the series.
2. Having the transponders they used in "Patterns of Force" available and not standard for landing parties seems crazy, especially considering the number of times they beam down and get captured for whatever reason
3. I definitely thought it was WTF that Kirk just randomly decides, for the first time ever, to have a code based on a chess scenario between himself and Scotty to add an extra layer of security during "Whom Gods Destroy"
4. I always laugh at Spock running back to "return fire" with the giant spear the natives throw at them during the final minutes of "Galileo Seven" while he yells at the others to get in the ship and take off. Also in G7, why do they leave poor Mr. Gaetano behind to "stand guard?"
5. I have to be honest, pretty much the entire premise of "Mudd's Women" escapes me. Are we saying that a completely benign placebo still allowed Eve to transform into something she really wasn't?
6. In "Day of the Dove," what conditions would have existed that would allow the creature to trap over 400 crewpersons below the primary decks of the Enterprise? Were they having an all-hands meeting in the shuttlebay?