Putting Words in <CHARNAME>'s Mouth, right or wrong? Options

[Rabain]

What do people think of modders putting words in <charname>'s mouth?

For example, a modder wants you to do X so Y can happen, its part of his mod quest. However the player might not want to do X but the modder has designed his quest so that X has to happen so that shiny NPC can get uber item Z.

In order to facilitate this, modder puts words in <charname>'s mouth in order to make the player choose the right option eg:

Chain
NPC: I think we should go to castle X.
PC: I agree, let's go.
NPC: You will so not regret this <charname>!
Do LeaveAreaLua:(Everyone).

What do people think of this type of action? I understand that the norm is to give the player a choice, afterall it is the player who is roleplaying <charname> and should be able to choose rather than be dragged down a certain quest path.

Do you think this type of action should be avoided at all costs and the player should always have a choice even if it is to say "Ask me again later"?

I am not for or against this myself, depending on the way it has been integrated into the game. Though I would be wary of being dragged hither and yon by everyone whom I choose to join my party.