It makes sense. There are so many times that people witness to ithers, and only scare them farther away from Christianity. There is a fine line.
Missions trips can be good. My friend is doing the YWAM thing, and he is learning so much and doing so much good. But thats.not a short missions trips.
I see where the good in missions trips is, but all too often the people who went to help others, come back acting holier than thou.