I read the question in the FAQ that talks a bit about this, but the answer assumes that the reader will constantly be time traveling both to get unwanted villagers out, and to get new villagers to move in--rather than time traveling simply to get unwanted villagers out. The latter applies to me.
Ideally, what I'd like to do is time travel forward to get one unwanted villager out at a time, and then once that one villager is gone, immediately revert the clock back to the correct date and time. Then when I'm ready to send out the next villager, do the same thing, rinse and repeat. This is because I really don't want to ever be at a point where I'm more than like a week ahead of the real date. Is this a viable and safe way to go about it? Or, in reverting the clock back more frequently and in smaller increments, is there some added risk of my town getting messed up somehow, or of losing a villager I don't want to lose?
Sorry if that was a confusing or dumb question. I can try to explain it better if it doesn't make sense. :x