I wasn't planning on using this as a strategy, I just wanted others to comment on what would be the most likely response by an INFP given this scenario. When is an INFP not defended? Under what conditions do they actually reveal their feelings? Those are the underlying questions. It's a bit disconcerting to learn that even in a drunken state an INFP is unlikely to reveal much of anything. It seems to demonstrate to me the depths to which they will guard their feelings.
If you were to take a poll, I don't think this would be true of other types. Using myself (a nonINFP) as an example, I remember getting drunk many years ago and confessing my true feelings for a guy to a friend. I really regreted it later. I had no attention of EVER telling anyone and yet I spilled my guts out to a friend. I was later embarrassed by my remarks - so personal. I think I did it though because I had carried the feelings so long, I felt I needed to be able to share with someone the depths of my feelings else I would explode. Why wouldn't an INFP be the same?