What if I just started walking around in a park in Germany and decided to pick up all the litter I saw and throw it in the proper place? Would that be disrespectful of local tradition? It wouldnt hurt anyone, but by your logic it could be bad because then others may have to do it too or possibly face looking bad.

Its not disrespectful to tip, its just not done by Europeans, thats all.

For me to tip in EU hurts no one, gets me better services, and upholds out gernerous American nature.

DMH