I think the names of the people whose clue you are guessing should not be shown. This would make it harder for any possible manipulation of the game.
Possible manipulations could be that one might guess wrong on purpose so that a particular player gets less points. I know you also lose a point but it might be worth it overall somehow. I have seen so many clues that were absolutely obvious as to the answer but then someone guesses a really weird answer and gets it wrong. It feels like it must be on purpose.
Another is that one could notice a pattern in how someone gives clues and so it makes it easier to figure out what they're trying to convey if you know how that person plays. Keeping the clue giver anonymous alleviates this a bit.
And also, it's easy to throw the game to someone in particular if you know whose clue things are if you are so inclined.
Possible manipulations could be that one might guess wrong on purpose so that a particular player gets less points. I know you also lose a point but it might be worth it overall somehow. I have seen so many clues that were absolutely obvious as to the answer but then someone guesses a really weird answer and gets it wrong. It feels like it must be on purpose.
Another is that one could notice a pattern in how someone gives clues and so it makes it easier to figure out what they're trying to convey if you know how that person plays. Keeping the clue giver anonymous alleviates this a bit.
And also, it's easy to throw the game to someone in particular if you know whose clue things are if you are so inclined.