Hmmm yes, taking it too far with NTs will blow up. I think the trick here is to convince them that they came up with the solution themselves. What ptg said about "there are strangers walking up and down the hall" fits in this scenario.NTs are a little trickier. If you have a solid case, you can sell them on it, but they will find the flaws if they can, and they hate being coerced into anything -- they really have to think it's their choice. Emotional overload might do something to them, either muddy their thinking, but it's liable to blow up in your face too. I suppose seduction would work, for the opposite sex.
As far as NF's go, I don't think I will share any of THAT... in case I need to use it.
NFs? Easy enough give us the good old That usually does the trick