I'll ask again. What was the point of trapping players like Bent and Irwin in the final seconds of a blowout after not doing so the entire game? The issue is not the voracity with which UCF was playing.
Having watched the game in person last night and then re-watched it via DVR, let me offer a hypothesis about how the trap on Kyla came to be.
First of all, let me say that I'm pretty sure that it didn't happen because Coach A said to her team with less than a minute left, "I see that #25 is coming into the game. She can't handle the ball. Trap her aggressively." I'm sure her last minute instructions were something on the order of "Forget the score. Play like it's the first minute of the game and the score is 0-0. That's what we do here."
Let me also guess that, like most good teams, UCF had prepared a scouting report before the game that covered each of the UConn players' games, with an emphasis on weaknesses that could be exploited. For the bench, it would have been a sentence or two, such as maybe this:
#4 -- "Has no jump shot, but can move. Sag off of her."
#10 -- "Gets flustered when she makes decisions with the ball. Trap her aggressively, and don't let her get open for a 3."
#25 -- "Not used to handling the ball. When she gets it, trap aggressively."
#32 -- "Foul prone. Go right at her under the basket."
So, when her own bench players got in at the end of the game, they did what they assumed their coach would want -- they followed the scout and trapped #25. If they didn't, they figured the coach would yell at them, just as Geno would have.
There was nothing at the end of the scout that said, "But of course, if there is only a minute left and the game has been decided, don't do any of these things." And I find it understandable that Coach A would not have thought to say that.
And on a related subject, I am completely unable to understand why anyone would think that it is bad sportsmanship for players on the bench to cheer when their team does something good, regardless of the score. That's what bench players are supposed to do -- cf. Geno in the famous video clip, endlessly cited here, about how bench players that are uninvolved in the game will never play -- EVER!!!