Forcing a last request = forcing a death game. You are basically telling the T pick something that ends in me killing you, or I kill you for not doing that. As in the example that Anguish gave you, that is the best way IMO to counter a T refusing to LR.
And actually, taken from that same thread you linked about the expanded MOTD
Forcing LR is forcing them to do something that kills them.
With your example, I personally don't think you should have just killed the two farting around and swimming. I still don't think orders of, as an example, "go to big cage. Be there by 3:00" are allowed, as IMO it fits under what Xeno said in the admin section back in September.
To me, at least, saying "by 3:00" (since most of the time by 3:00 is followed up by "or KOS"), is just a way to bypass warning shots. For example, the order is be in big cage by 3:00. Well, a T happens to be afk, comes back, and is clearly on his way to big cage by since its now 2:55, he can be killed?
IMO, with the example you gave, since the Ts were just farting around and swimming, I would just consider it a delay. It's not like they are in say showers, or they are trying to rebel. I would have just warning shot them and told them to get on the diving board. I will defer to a higher up, as they might see the situation different.
Taken from this image the rule states that CTs may camp if it helps their team, and that last must not delay. There is no rule that last CT can not camp. This is a common misconception. People often respond to this with "camping is delaying".Not necessarily. Another good example is the scout tower on lego. If the order is say, soccer. And the last CT is in the scout tower, and Ts are actively rebelling, and the CT is killing the rebels from the tower, he isn't delaying. He is camping, but not delaying.
As CT, it is your job to make sure that the Ts aren't rebelling, and as it was just a freeday, you enforce that they aren't doing shit like going on a catwalk, or going in a vent, or walking around with a primary. To counter your "why should I be the one to go out there", why should they be the ones having to rush into armory where you have the upper hand? I wouldn't say you were breaking a rule by camping, but it could be argued it was delaying.
That does however make me question the difference between camping armory during a freeday, and camping soccer during a "freeday no soccer." I'd like a higher up's opinion on how this would be ruled in regards to delaying.