Originally Posted by
stifle
In practice it depends on the mood of the immigration official. If the worst that can happen is that you are refused entry into Germany and told to leave on the flight you were going to take anyway, you might as well try it.
But if the connecting flight is an intra-Schengen flight, there might be a problem.
I once did something similar to hit a miles target, and the Swiss immigration officer was very suspicious of my reasons for choosing that route. However he relented after noting several Schengen entry/exit stamps as well as numerous UK entry stamps (my final destination on that trip) in my passport.